Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Mar. 31, 2018	May 04, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	EXTREME NETWORKS INC
Entity Central Index Key	0001078271
Current Fiscal Year End Date	--06-30
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Trading Symbol	EXTR
Amendment Flag	false
Entity Common Stock, Shares Outstanding		115,892,565

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017
Current assets:
Cash and cash equivalents	$ 103,177	$ 130,450
Accounts receivable, net of allowance for doubtful accounts of $1,796 at March 31, 2018 and $1,190 at June 30, 2017	188,408	93,115
Inventories	77,756	47,410
Prepaid expenses and other current assets	26,659	27,867
Total current assets	396,000	298,842
Property and equipment, net	86,487	30,240
Intangible assets, net	85,406	25,337
Goodwill	129,244	80,216
Other assets	43,348	25,065
Total assets	740,485	459,700
Current liabilities:
Current portion of long-term debt	24,720	12,280
Accounts payable	90,800	31,587
Accrued compensation and benefits	40,591	42,662
Accrued warranty	12,812	10,584
Deferred revenue	117,741	79,048
Other accrued liabilities	77,042	37,044
Total current liabilities	363,706	213,205
Deferred revenue, less current portion	38,828	25,293
Long-term debt, less current portion	153,958	80,422
Deferred income taxes	5,628	6,576
Other long-term liabilities	65,440	8,526
Commitments and contingencies (Note 9)
Stockholders’ equity:
Convertible preferred stock, $.001 par value, issuable in series, 2,000,000 shares authorized; none issued
Common stock, $.001 par value, 750,000,000 shares authorized; 115,752,827 shares issued and outstanding at March 31, 2018 and 110,924,508 shares issued and outstanding at June 30, 2017	116	111
Additional paid-in-capital	935,726	909,155
Accumulated other comprehensive loss	(471)	(2,302)
Accumulated deficit	(822,446)	(781,286)
Total stockholders’ equity	112,925	125,678
Total liabilities and stockholders’ equity	$ 740,485	$ 459,700

Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017
Current assets:
Allowance for doubtful accounts	$ 1,796	$ 1,190
Stockholders’ equity:
Convertible preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Convertible preferred stock, shares authorized	2,000,000	2,000,000
Convertible preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	115,752,827	110,924,508
Common stock, shares outstanding	115,752,827	110,924,508

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Net revenues:
Product	$ 203,527	$ 111,321	$ 543,151	$ 319,469
Service	58,477	37,875	161,691	108,708
Total net revenues	262,004	149,196	704,842	428,177
Cost of revenues:
Product	94,485	52,275	253,002	159,151
Service	24,536	14,117	67,490	40,684
Total cost of revenues	119,021	66,392	320,492	199,835
Gross profit:
Product	109,042	59,046	290,149	160,318
Service	33,941	23,758	94,201	68,024
Total gross profit	142,983	82,804	384,350	228,342
Operating expenses:
Research and development	50,920	24,691	131,112	67,003
Sales and marketing	72,240	38,790	193,460	116,674
General and administrative	11,707	9,612	35,561	27,296
Acquisition and integration costs, net of bargain purchase gain	9,316	3,418	47,675	9,908
Restructuring and related charges, net of reversals	4,920	7,719	4,920	9,572
Amortization of intangibles	2,101	1,193	6,461	7,510
Total operating expenses	151,204	85,423	419,189	237,963
Operating loss	(8,221)	(2,619)	(34,839)	(9,621)
Interest income	740	236	2,104	374
Interest expense	(4,044)	(1,177)	(8,763)	(3,000)
Other income (expense), net	(359)	(251)	2,125	551
Loss before income taxes	(11,884)	(3,811)	(39,373)	(11,696)
Provision for income taxes	1,729	1,166	1,787	3,252
Net loss	$ (13,613)	$ (4,977)	$ (41,160)	$ (14,948)
Basic and diluted net loss per share:
Net loss per share - basic	$ (0.12)	$ (0.05)	$ (0.36)	$ (0.14)
Net loss per share - diluted	$ (0.12)	$ (0.05)	$ (0.36)	$ (0.14)
Shares used in per share calculation - basic	115,059	109,213	113,641	107,531
Shares used in per share calculation - diluted	115,059	109,213	113,641	107,531

Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net loss:	$ (13,613)	$ (4,977)	$ (41,160)	$ (14,948)
Available for sale securities:
Change in unrealized gains on available for sale securities	503		740
Net change in foreign currency translation adjustments	304	749	1,091	(225)
Other comprehensive income (loss), net of tax:	807	749	1,831	(225)
Total comprehensive loss	$ (12,806)	$ (4,228)	$ (39,329)	$ (15,173)

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net loss	$ (41,160)	$ (14,948)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation	15,417	7,716
Amortization of intangible assets	17,771	13,781
Provision for doubtful accounts	1,566	21
Stock-based compensation	19,646	9,328
Deferred income taxes	(1,900)	1,507
Non-cash restructuring and related charges		2,578
Realized gain on sale of non-marketable equity investment	(3,757)
Realized gain on bargain purchase	(5,030)
Other non-cash items	2,441	457
Changes in operating assets and liabilities, net of acquisitions
Accounts receivable	(45,376)	7,232
Inventories	5,122	4,724
Prepaid expenses and other assets	(3,711)	8,031
Accounts payable	28,912	4,907
Accrued compensation and benefits	(4,779)	(1,322)
Deferred revenue	10,365	(6,245)
Other current and long-term liabilities	2,743	6,194
Net cash (used in) provided by operating activities	(1,730)	43,961
Cash flows from investing activities:
Capital expenditures	(21,999)	(7,832)
Business acquisitions	(97,581)	(51,088)
Proceeds from sale of non-marketable equity investment	4,922
Deposit related to an acquisition		(10,239)
Net cash used in investing activities	(114,658)	(69,159)
Cash flows from financing activities:
Borrowings under Term Loan	100,000	48,250
Repayments of debt	(13,278)	(7,775)
Loan fees on borrowings	(1,494)	(1,327)
Proceeds from issuance of common stock, net of tax withholding	4,657	9,180
Payments of contingent consideration	(671)
Net cash provided by financing activities	89,214	48,328
Foreign currency effect on cash	(99)	28
Net (decrease) increase in cash and cash equivalents	(27,273)	23,158
Cash and cash equivalents at beginning of period	130,450	94,122
Cash and cash equivalents at end of period	103,177	117,280
Non-cash investing activities:
Unpaid capital expenditures	$ 12,608	$ 963

Description of Business and Basis of Presentation

9 Months Ended

Mar. 31, 2018

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Description of Business and Basis of Presentation

1.	Description of Business and Basis of Presentation

Extreme Networks, Inc., together with its subsidiaries (collectively referred to as “Extreme” or the “Company”), is a leader in providing software-driven networking solutions for enterprise customers. The Company conducts its sales and marketing activities on a worldwide basis through distributors, resellers and the Company’s field sales organization. Extreme was incorporated in California in 1996 and reincorporated in Delaware in 1999.

The unaudited condensed consolidated financial statements of Extreme included herein have been prepared under the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted under such rules and regulations. The condensed consolidated balance sheet at June 30, 2017 was derived from audited financial statements as of that date but does not include all disclosures required by generally accepted accounting principles for complete financial statements. These interim financial statements and notes should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2017.

The unaudited condensed consolidated financial statements reflect all adjustments, consisting only of normal recurring adjustments that, in the opinion of management, are necessary for a fair presentation of the results of operations and cash flows for the interim periods presented and the financial condition of Extreme at March 31, 2018. The results of operations for the three and nine months ended March 31, 2018 are not necessarily indicative of the results that may be expected for fiscal 2018 or any future periods.

Effective July 1, 2017, the Company adopted the requirements of Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606). All amounts and disclosures set forth in this Form 10-Q have been updated to comply with the new standards, as indicated by the “as adjusted” footnote.

Fiscal Year

The Company uses a fiscal calendar year ending on June 30. All references herein to “fiscal 2018” or “2018” represent the fiscal year ending June 30, 2018. All references herein to “fiscal 2017” or “2017” represent the fiscal year ended June 30, 2017.

Principles of Consolidation

The consolidated financial statements include the accounts of Extreme and its wholly-owned subsidiaries. All inter-company accounts and transactions have been eliminated.

The Company predominantly uses the United States Dollar as its functional currency. The functional currency for certain of its foreign subsidiaries is the local currency. For those subsidiaries that operate in a local currency functional environment, all assets and liabilities are translated to United States Dollars at current month end rates of exchange; and revenue and expenses are translated using the monthly average rate.

Accounting Estimates

The preparation of financial statements and related disclosures in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Estimates are used for, but are not limited to, the accounting for the allowances for doubtful accounts and sales returns, determining the fair value of acquired assets and assumed liabilities, estimated selling prices, inventory valuation and purchase commitments, depreciation and amortization, impairment of long-lived assets including goodwill, warranty accruals, restructuring liabilities, measurement of share-based compensation costs, measurements of contingent consideration and income taxes. Actual results could differ from these estimates.

Business Combinations

9 Months Ended

Mar. 31, 2018

Business Combinations [Abstract]

Business Combinations

2. Business Combinations

The Company completed three acquisitions during the nine months ended March 31, 2018. The acquisitions have been accounted for using the acquisition method of accounting. The purchase price has been allocated on a preliminary basis to tangible and identifiable intangible assets acquired and liabilities assumed. The fair value of working capital related items, such as other current assets and accrued liabilities, approximated their book values at the date of acquisition. Inventories were valued at fair value using the net realizable value approach. The fair value of property and equipment was determined using a cost approach. The fair value of the acquired deferred revenue was estimated using the cost build-up approach. The cost build-up approach determines fair value using estimates of the costs required to provide the contracted deliverables plus an assumed profit. The total costs including the assumed profit were adjusted to present value using a discount rate considered appropriate. The resulting fair value approximates the amount that the Company would be required to pay to a third party to assume the obligation. Valuations of the intangible assets were valued using income approaches based on management projections, which we consider to be Level 3 inputs. The Company also continues to analyze the tax implications of the acquisition of the intangible assets which may ultimately impact the overall level of goodwill associated with the acquisition.

The final purchase price allocation for all assets acquired and liabilities assumed is pending the finalization of valuations as additional information is gathered surrounding events that existed as of the acquisition date, which may result in an adjustment to the preliminary purchase price allocation. Also, additional information which existed as of the acquisition dates, but was unknown to the Company at that time, may become known to the Company during the remainder of the measurement period (up to one year from the acquisition dates), and may result in a change in the purchase price allocation. While management believes that its preliminary estimates and assumptions underlying the valuations are reasonable, different estimates and assumptions could result in different valuations assigned to the individual assets acquired and liabilities assumed, and the resulting amount of goodwill. Results of operations of the acquired entities are included in the Company’s operations beginning with the closing date of each acquisition.

Fiscal 2018 Acquisitions

Data Center Business

The Company completed its acquisition of the data center business (the “Data Center Business”) of Brocade Communication Systems, Inc.’s (“Brocade”) on October 27, 2017 (the “Data Center Closing Date”), pursuant to an Asset Purchase Agreement (the “Data Center Business APA”) dated as of October 3, 2017, by and between the Company and Brocade. Under the terms and conditions of the Data Center Business APA, the Company acquired customers, employees, technology and other assets of the Data Center Business as well as assumed certain contracts and other liabilities of the Data Center Business.

The fair value of consideration transferred on the Data Center Business Closing Date includes:

•

upfront cash closing payment equal to $23.0 million,

•

deferred payments of $1.0 million per quarter for the next twenty full fiscal quarters of the Company following the acquisition date discounted to their present value,

•

contingent consideration in the form of quarterly earnout payments equal to 50% of the profits of the Data Center Business for the five-year period commencing at the end of the first full fiscal quarter of the Company following the acquisition of the Data Center Business discounted to their present value,

•

an amount payable due to the excess working capital acquired over the target working capital agreed upon in the Data Center Business APA, and,

•

portion of the fair value of replacement stock awards granted to employees assumed from Brocade for which their services were provided prior to the Data Center Business Closing Date.

The components of aggregate estimated purchase consideration are as follows (in thousands):

Estimated purchase consideration	October 27, 2017
Cash paid to sellers at closing	$	23,000
Deferred payments		18,430
Contingent consideration		34,100
Working capital adjustment		6,534
Replacement of stock-based awards		2,273
Aggregate estimated purchase consideration	$	84,337

The following table below summarizes the preliminary allocation as of March 31, 2018 of the tangible and identifiable intangible assets acquired and liabilities assumed (in thousands):

	Preliminary Allocation as of December 31, 2017			Change during three months ended March 31, 2018				Preliminary Allocation as of March 31, 2018
Accounts receivables	$	33,488		$	—			$	33,488
Inventories		19,973			(39	)	(a)		19,934
Prepaid expenses and other current assets		988			—				988
Property and equipment		29,160			—				29,160
Other assets		4,734			—				4,734
Accounts payable and accrued expenses		(15,850	)		113		(b)		(15,737	)
Deferred revenue		(33,519	)		494		(c)		(33,025	)
Net tangible assets acquired		38,974			568				39,542
Identifiable intangible assets		28,600			3,600		(d)		32,200
Goodwill		16,763			(4,168	)			12,595
Total intangible assets acquired		45,363			(568	)			44,795
Total net assets acquired	$	84,337		$	—			$	84,337

The changes during the period in the table above include: a) additional information regarding the existence of inventories and unpaid invoices as of the acquisition date, b) additional information on unpaid invoices as of the acquisition date, c) an adjustment of the fair value of deferred maintenance revenue and d) revised fair value based on adjustments to discount rate used in the models for usefulness of identifiable intangible assets.

The following table presents details of the identifiable intangible assets acquired as part of the acquisition (dollars in thousands):

Intangible Assets	Estimated Useful Life (in years)		Amount
Developed technology	2 - 5		$	25,400
Customer relationships		5		5,400
Trade names		4		1,400
Total identifiable intangible assets			$	32,200

The amortization for the developed technology is recorded in “Cost of revenues” for product and the amortization for the remaining intangibles is recorded in “Amortization of intangibles” in the accompanying condensed consolidated statements of operations. The goodwill recognized is attributable primarily to expected synergies and the assembled workforce of the Data Center Business. The Company anticipates both the goodwill and intangible assets to be fully deductible for income tax purposes.

The results of operations of the Data Center Business are included with those of the Company beginning October 28, 2017. The Data Center Business revenue for the nine months ended March 31, 2018 was $90.2 million and has been incorporated into the revenue of the Company. The associated expenses of the Data Center Business have been incorporated with the results of operations of the Company as a product line and, therefore, stand-alone operating results are not available. In the three and nine months ended March 31, 2018 the Company incurred $5.0 million and $38.8 million, respectively, of acquisition and integration related expenses associated with the acquisition of the Data Center Business, including a $25.0 million consent fee paid to terminate a previous asset purchase agreement entered into by the Company to purchase the Data Center Business from Broadcom Corporation, in anticipation of Broadcom’s proposed acquisition of Brocade. The fee was paid to allow the Company to buy the Data Center Business directly from Brocade. Such acquisition-related costs are included in “Acquisition and integration costs, net of bargain purchase gain” in the accompanying condensed consolidated statements of operations. The costs, which the Company expensed as incurred, consist primarily of professional fees to financial and legal advisors and IT consultants.

Campus Fabric Business

The Company completed its acquisition of Avaya Inc.’s. (“Avaya”) fabric-based secure networking solutions and network security solutions business (the “Campus Fabric Business”) on July 14, 2017, (the “Campus Fabric Business Closing Date”) pursuant to an Asset Purchase Agreement (the “Campus Fabric Business APA”) dated March 7, 2017. Under the terms and conditions of the Campus Fabric Business APA, the Company acquired the customers, employees, technology and other assets of the Campus Fabric Business, as well as assumed certain contracts and other liabilities of the Campus Fabric Business, for total provisional consideration of $79.8 million, calculated as $100.0 million, less adjustments set forth in the Campus Fabric Business APA related to net working capital, deferred revenue, certain assumed lease obligations and certain assumed pension obligations for transferring employees of the Campus Fabric Business. Pursuant to certain ancillary agreements, Avaya will also provide the Company with transition services for a period of time following the Campus Fabric Business Closing Date.

The following table below summarizes the preliminary allocation as of March 31, 2018 of the tangible and identifiable intangible assets acquired and liabilities assumed (in thousands):

	Preliminary Allocation as of December 31, 2017			Change during three months ended March 31, 2018				Preliminary Allocation as of March 31, 2018
Accounts receivables	$	18,295		$	417		(a)	$	18,712
Inventories		15,545			—				15,545
Prepaid expenses and other current assets		673			(24	)	(b)		649
Property and equipment		3,768			1,638		(c)		5,406
Other assets		5,311			(517	)	(d)		4,794
Accounts payable and accrued expenses		(31,919	)		(395	)	(c)		(32,314	)
Deferred revenue		(10,051	)		1,057		(e)		(8,994	)
Other long-term liabilities		(5,205	)		—				(5,205	)
Net tangible assets acquired		(3,583	)		2,176				(1,407	)
Identifiable intangible assets		46,900			(4,700	)	(f)		42,200
In-process research and development		2,500			100		(f)		2,600
Goodwill		34,009			2,424				36,433
Total intangible assets acquired		83,409			(2,176	)			81,233
Total net assets acquired	$	79,826		$	—			$	79,826

The changes during the period in the table above include: a) additional information on accounts receivable as of the acquisition date, b) additional information on prepaid expenses as of the acquisition date, c) update on preliminary estimate of the fair value of property and equipment which led to an increase, d) an adjustment of the fair value of deferred maintenance revenue and associated deferred cost of revenue, e) additional information on unpaid invoices as of the acquisition date, and f) revised fair value based on revisions to estimated useful life of identifiable intangible assets and in-process research and development acquired.

The following table presents details of the identifiable intangible assets acquired as part of the acquisition (dollars in thousands):

Intangible Assets	Estimated Useful Life (in years)		Amount
Developed technology	2 - 4		$	32,700
Customer relationships		4		5,100
Trade names	4 - 5			2,600
Backlog		1		1,800
Total identifiable intangible assets			$	42,200

The amortization for the developed technology is recorded in “Cost of revenues” for product and the amortization for the remaining intangibles is recorded in “Amortization of intangibles” in the accompanying condensed consolidated statement of operations. The goodwill recognized is attributable primarily to expected synergies and the assembled workforce of the Campus Fabric Business. The Company anticipates both the goodwill and intangible assets to be fully deductible for income tax purposes.

The Company also acquired an indefinite lived asset of $2.6 million which represents the fair value of in-process research and development activities. During the three months ended March 31, 2018, the related research and development efforts were completed and the Company reclassified the in-process research and development of $2.6 million to developed technology and began recognizing amortization expense over its estimated useful life.

The results of operations of the Campus Fabric Business are included in the accompanying condensed consolidated results of operations beginning July 14, 2017. The Campus Fabric Business revenue for the nine months ended March 31, 2018 was $127.7 million and has been incorporated into the revenue of the Company. The associated expenses of the Campus Fabric Business have been incorporated with the results of operations of the Company as a product line and, therefore, stand-alone operating results are not available. In the three and nine months ended March 31, 2018, the Company incurred $4.4 million and $13.9 million, respectively, of acquisition and integration related expenses associated with the acquisition of the Campus Fabric Business. Such acquisition-related costs are included in “Acquisition and integration costs, net of bargain purchase gain” in the accompanying condensed consolidated statements of operations. The costs, which the Company expensed as incurred, consist primarily of professional fees to financial and legal advisors and IT consultants and companies.

Capital Financing Business

On December 1, 2017, Company completed its acquisition of a capital financing business (the “CF Business”), pursuant to a Bill of Sale and Assignment and Assumption Agreement (the “Assumption Agreement”) between the Company and Broadcom. Under the terms and conditions of the Assumption Agreement, the Company acquired customers, employees, contracts and lease equipment of the CF Business equal to the earn out payments to Broadcom of 90% of acquired financing receivables to be collected commencing at the closing date.

Net assets acquired included financing receivables of $13.7 million, lease equipment of $3.5 million and identifiable intangible assets of $0.8 million, and the fair value of the contingent consideration was $13.0 million. As the preliminary fair value of the net assets acquired exceeded the fair value of the purchase consideration, the Company recorded a bargain purchase gain of $5.0 million which is included in “Acquisition and integration costs, net of bargain purchase gain” in the accompanying condensed consolidated statements of operations. Acquisition and integration related expenses associated with the acquisition of the CF Business were immaterial.

Fiscal 2017 Acquisition

On October 28, 2016, the Company completed its acquisition of the wireless local area network business (“WLAN Business”) from Zebra Technologies Corporation. Under the terms of the WLAN Asset Purchase Agreement, the Company acquired customers, employees, technology and other assets as well as assumed certain contracts and other liabilities of the WLAN Business, for a net cash consideration to $49.5 million. The following table below summarizes the final allocation of the tangible and identifiable intangible assets acquired and liabilities assumed (in thousands):

	Final Allocation as of October 28, 2016
Accounts receivables, net	$	14,636
Inventories		13,593
Other current assets		808
Property and equipment		3,159
Other assets		7,634
Deferred revenue		(14,159	)
Other liabilities		(7,201	)
Total tangible assets acquired and liabilities assumed		18,470
Identifiable intangible assets		20,300
In-process research and development		1,400
Goodwill		9,339
Total intangible assets acquired		31,039
Total net assets acquired	$	49,509

Pro forma financial information

The following unaudited pro forma results of operations are presented as though the acquisitions of the Data Center Business, CF Business, Campus Fabric Business and WLAN Businesses had occurred as of the beginning of the earliest period presented after giving effect to purchase accounting adjustments relating to inventories, deferred revenue, depreciation and amortization on acquired property and equipment and intangibles, acquisition costs, interest income and expense and related tax effects.

The pro forma results of operations are not necessarily indicative of the combined results that would have occurred had the acquisition been consummated as of the earliest period presented, nor are they necessarily indicative of future operating results. The unaudited pro forma results do not include the impact of synergies, nor any potential impacts on current or future market conditions which could alter the unaudited pro forma results.

The unaudited pro forma financial information for the three and nine months ended March 31, 2018, combines the results for Extreme for the three and nine months ended March 31, 2018, which include the results of the Data Center Business, CF Business and Campus Fabric Business subsequent to their acquisition dates and their historical results up to the acquisition date.

The unaudited pro forma financial information for the three and nine months ended March 31, 2017, combines the historical results for Extreme for those periods, as adjusted for the adoption of Topic 606, with the historical results of the Data Center Business, CF Business and Campus Fabric Business for the three and nine months ended March 31, 2017, as well as the historical results of the WLAN Business prior to the WLAN Business acquisition date.

Pro forma results of operations from the Data Center Business, CF Business, Campus Fabric Business and WLAN Business acquisitions included in the pro forma results of operations for the three and nine months ended March 31, 2017 have not been adjusted for the adoption of Topic 606 because the Company determined that it is impractical to estimate the impact of the adoption.

The following table summarizes the unaudited pro forma financial information (in thousands, except per share amounts):

	Three Months Ended						Nine Months Ended
	March 31, 2018			March 31, 2017			March 31, 2018			March 31, 2017
				(As adjusted)						(As adjusted)
Net revenues	$	262,004		$	267,176		$	799,044		$	911,611
Net loss	$	(13,613	)	$	(40,235	)	$	(21,235	)	$	(136,207	)
Net loss per share - basic	$	(0.12	)	$	(0.37	)	$	(0.19	)	$	(1.27	)
Net loss per share - diluted	$	(0.12	)	$	(0.37	)	$	(0.19	)	$	(1.27	)
Shares used in per share calculation - basic		115,059			109,213			113,641			107,531
Shares used in per share calculation - diluted		115,059			109,213			113,641			107,531

Summary of Significant Accounting Policies

9 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

3.	Summary of Significant Accounting Policies

For a description of significant accounting policies, see Note 3, Summary of Significant Accounting Policies, to the consolidated financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2017. Except for the following policies, there have been no material changes to the Company’s significant accounting policies since the filing of the Annual Report on Form 10-K.

Revenue Recognition

The Company accounts for revenue in accordance with Topic 606, Revenue from Contracts with Customers, which the Company adopted on July 1, 2017, using the retrospective method. The Company derives the majority of its revenue from sales of its networking equipment, with the remaining revenue generated from service fees relating to maintenance contracts, professional services, and training for its products. The Company sells its products and maintenance contracts direct to customers and to partners in two distribution channels, or tiers. The first tier consists of a limited number of independent distributors that stock its products and sell primarily to resellers. The second tier of the distribution channel consists of a non-stocking distributors and value-added resellers that sell directly to end-users. Products and services may be sold separately or in bundled packages.

The Company considers customer purchase orders, which in some cases are governed by master sales agreements, to be the contracts with a customer. For each contract, the Company considers the promise to transfer products and services, each of which are distinct, to be the identified performance obligations. In determining the transaction price the Company evaluates whether the price is subject to refund or adjustment to determine the net consideration to which the Company expects to be entitled.

For all of the Company’s sales and distribution channels, revenue is recognized when control of the product is transferred to the customer (i.e., when the Company’s performance obligation is satisfied), which typically occurs at shipment for product sales. Revenue from maintenance contracts is recognized over time as the Company’s performance obligations are satisfied. This is typically the contractual service period, which ranges from one to three years. For product sales to value-added resellers of the Company, non-stocking distributors and end-user customers, the Company generally does not grant return privileges, except for defective products during the warranty period, nor does the Company grant pricing credits. Sales incentives and other programs that the Company may make available to these customers are considered to be a form of variable consideration and the Company maintains estimated accruals and allowances using the expected value method. There were no material changes in the current period to the estimated transaction price for performance obligations which were satisfied or partially satisfied during previous periods.

Sales to stocking distributors are made under terms allowing certain price adjustments and limited rights of return (known as “stock rotation”) of the Company’s products held in their inventory. Revenue from sales to distributors is recognized upon the transfer of control to the distributor. Frequently, distributors need to sell at a price lower than the contractual distribution price in order to win business, and submit rebate requests for Company pre-approval prior to selling the product through at the discounted price. At the time the distributor invoices its customer or soon thereafter, the distributor submits a rebate claim to the Company to adjust the distributor’s cost from the contractual price to the pre-approved lower price. After the Company verifies that the claim was pre-approved, a credit memo is issued to the distributor for the rebate claim. In determining the transaction price, the Company considers these rebate adjustments to be variable consideration. Such price adjustments are estimated using the expected value method based on an analysis of actual claims, at the distributor level over a period of time considered adequate to account for current pricing and business trends. Stock rotation rights grant the distributor the ability to return certain specified amounts of inventory. Stock rotation adjustments are an additional form of variable consideration and are also estimated using the expected value method based on historical return rates. There were no material changes in the current period to the estimated variable consideration for performance obligations which were satisfied or partially satisfied during previous periods.

Performance Obligations. A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account in Topic 606. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. Certain of the Company’s contracts have multiple performance obligations, as the promise to transfer individual goods or services is separately identifiable from other promises in the contracts and, therefore, is distinct. For contracts with multiple performance obligations, the Company allocates the contract’s transaction price to each performance obligation based on its relative standalone selling price. The stand-alone selling prices are determined based on the prices at which the Company separately sells these products. For items that are not sold separately, the Company estimates the stand-alone selling prices using the best estimated selling price approach.

The Company’s performance obligations are satisfied at a point in time or over time as work progresses. Substantially all of the Company’s product sales revenues as reflected on the condensed consolidated statements of operations for the three and nine months ended March 31, 2018 and 2017 are recognized at a point in time. Substantially all of the Company’s service revenue is recognized over time. For revenue recognized over time, the Company uses an input measure, days elapsed, to measure progress.

On March 31, 2018, the Company had $156.6 million of remaining performance obligations, which is comprised of deferred maintenance revenue and services not yet delivered. The Company expects to recognize approximately 33 percent of its remaining performance obligations as revenue in fiscal 2018, an additional 48 percent in fiscal 2019 and 19 percent of the balance thereafter.

Contract Balances. The timing of revenue recognition, billings and cash collections results in billed accounts receivable and deferred revenue in the consolidated balance sheet. Services provided under renewable support arrangements of the Company are billed in accordance with agreed-upon contractual terms, which are typically at periodic intervals (e.g., quarterly or annually). The Company sometimes receives payments from its customers in advance of services being provided, resulting in deferred revenues. These liabilities are reported on the consolidated balance sheet on a contract-by-contract basis at the end of each reporting period.

Revenue recognized for the nine months ended March 31, 2018 and 2017, that was included in the deferred revenue balance at the beginning of each period was $66.7 million and $61.4 million, respectively. Revenue recognized for the three months ended March 31, 2018 and 2017 that was included in the deferred revenue balance at the beginning of each period was $50.6 million and $31.3 million, respectively.

Contract Costs. The Company recognizes the incremental costs of obtaining contracts as an expense when incurred if the amortization period of the assets that the Company otherwise would have recognized is one year or less. Management expects that commission fees paid to sales representative as a result of obtaining service contracts and contract renewals are recoverable and therefore the Company capitalized them as contract costs in the amount of $3.1 million and $2.5 million at March 31, 2018 and June 30, 2017, respectively. Capitalized commission fees are amortized on a straight-line basis over the average period of service contracts of approximately three years, and are included in “Sales and marketing” in the accompanying condensed consolidated statements of operations. Amortization recognized during the three months ended March 31, 2018 and 2017, was $0.5 million and $0.4 million, respectively. Amortization recognized during the nine months ended March 31, 2018 and 2017 was $1.4 million and $1.1 million, respectively. There was no impairment loss in relation to the costs capitalized.

Revenue by Category: The following table sets forth the Company’s revenue disaggregated by sales channel and geographic region based on the customer’s ship-to locations (in thousands, unaudited):

	Three Months Ended
	March 31, 2018						March 31, 2017
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	76,392	$	56,929	$	133,321	$	31,972	$	47,367	$	79,339
Other		4,288		6,165		10,453		1,559		1,901		3,460
Total Americas		80,680		63,094		143,774		33,531		49,268		82,799
EMEA:		58,668		36,120		94,788		32,090		20,136		52,226
APAC:		3,085		20,357		23,442		2,399		11,772		14,171
Total net revenues	$	142,433	$	119,571	$	262,004	$	68,020	$	81,176	$	149,196

	Nine Months Ended
	March 31, 2018						March 31, 2017
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	181,415	$	160,484	$	341,899	$	98,026	$	112,592	$	210,618
Other		13,417		20,252		33,669		5,779		14,772		20,551
Total Americas		194,832		180,736		375,568		103,805		127,364		231,169
EMEA:		165,856		97,647		263,503		99,459		61,026		160,485
APAC:		11,480		54,291		65,771		5,464		31,059		36,523
Total net revenues	$	372,168	$	332,674	$	704,842	$	208,728	$	219,449	$	428,177

Business Combinations

The Company applies the acquisition method of accounting for business combinations. Under this method of accounting, all assets acquired and liabilities assumed are recorded at their respective fair values at the date of the completion of the transaction. Determining the fair value of assets acquired and liabilities assumed requires management’s judgment and often involves the use of significant estimates and assumptions, including assumptions with respect to future cash inflows and outflows, discount rates, intangibles and other asset lives, among other items. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price). Market participants are assumed to be buyers and sellers in the principal (most advantageous) market for the asset or liability. Additionally, fair value measurements for an asset assume the highest and best use of that asset by market participants. As a result, we may have been required to value the acquired assets at fair value measures that do not reflect its intended use of those assets. Use of different estimates and judgments could yield different results.

Any excess of the purchase price over the fair value of the net assets acquired is recognized as goodwill. If the fair value of net assets acquired exceeds the fair value of purchase price, a gain on bargain purchase is recognized in the statements of operations. Although we believe the assumptions and estimates we have made are reasonable and appropriate, they are based in part on historical experience and information that may be obtained from the management of the acquired company and are inherently uncertain. Unanticipated events and circumstances may occur that may affect the accuracy or validity of such assumptions, estimates or actual results. As a result, during the measurement period, which may be up to one year from the acquisition date, we may record adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to our consolidated statements of operations.

Recent Accounting Pronouncements

9 Months Ended

Mar. 31, 2018

Accounting Changes And Error Corrections [Abstract]

Recent Accounting Pronouncements

4.Recent Accounting Pronouncements

Recently Issued Accounting Pronouncements

In May 2017, the FASB issued ASU 2017-09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting which amends the scope of modification accounting for share-based payment arrangements and provides guidance on the types of changes to the terms or conditions of share-based payment awards to which an entity would be required to apply modification accounting under Topic 718. Specifically, an entity would not apply modification accounting if the fair value, vesting conditions, and classification of the awards are the same immediately before and after the modification. The guidance is effective prospectively for fiscal years beginning after December 15, 2017, and interim periods within that reporting period. Early adoption is permitted, including adoption in any interim period. The Company does not expect the adoption of this guidance to have a material effect on its financial statements. This guidance will be effective for the Company beginning with its fiscal year 2019.

In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments to provide guidance on the classification of eight cash flow issues in order to reduce diversity in practice. The new guidance is effective for fiscal years beginning after December 15, 2017, and interim periods within that reporting period. The amendments in this update should be applied using a retrospective transition method to each period presented. If impracticable to apply the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The Company does not expect the adoption of this guidance to have a material effect on its presentation of cash flows. This guidance will be effective for the Company beginning with its fiscal year 2019.

In January 2016, the FASB issued ASU No. 2016-01, Recognition and Measurement of Financial Assets and Financial Liabilities, which provides guidance for the recognition, measurement, presentation, and disclosure of financial assets and liabilities. The Company does not expect ASU 2016-01 will have a material effect on its consolidated financial statements and footnote disclosures. This guidance will become effective for the Company beginning with its fiscal year 2019.

In August 2017, the Financial Accounting Standards Board (“FASB”) issued ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities which is intended to allow companies to better align risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results by expanding and refining hedge accounting for both nonfinancial and financial risk components and aligning the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. The guidance is effective for fiscal years beginning after December 15, 2018. The Company is evaluating the accounting, transition and disclosure requirements of the standard and cannot currently estimate the financial statement impact of adoption. This guidance is effective for the Company beginning with its fiscal year 2020.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) which requires the identification of arrangements that should be accounted for as leases by lessees. In general, for lease arrangements exceeding a twelve-month term, these arrangements must now be recognized as assets and liabilities on the balance sheet of the lessee. Under Topic 842, a right-of-use asset and lease obligation will be recorded for all leases, whether operating or financing, while the statement of operations will reflect lease expense for operating leases and amortization/interest expense for financing leases. The balance sheet amount recorded for existing leases at the date of adoption of Topic 842 must be calculated using the applicable incremental borrowing rate at the date of adoption. In addition, Topic 842 requires the use of the modified retrospective method, which will require adjustment to all comparative periods presented in the consolidated financial statements. The Company is currently assessing the impact that adopting this new accounting standard will have on its consolidated financial statements and footnote disclosures. This guidance will become effective for the Company beginning with its fiscal year 2020.

Recently Adopted Accounting Pronouncements

Revenues Recognition

In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), to clarify the principles of recognizing revenue and create common revenue recognition guidance between U.S. GAAP and International Financial Reporting Standards. Under Topic 606, revenue is recognized when a customer obtains control of promised goods or services and is recognized at an amount that reflects the consideration expected to be received in exchange for such goods or services. In addition, Topic 606 requires disclosure of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.

The Company adopted Topic 606 on July 1, 2017, using the full retrospective method. This adoption primarily affected the Company’s accounting for distributor and resellers revenues from a primarily “sell-through” model, where revenue is recognized upon the sale from the distribution channel to the end customer, to the “sell-in” method where revenue is recognized upon transfer of control to its customers, including distributors. Under the sell-in method, the Company is required to make estimates at the time of shipment to its distributors of variable consideration as well as estimated returns under stock rotation rights granted to the distributors. Additionally, the Company capitalizes contract acquisition costs such as commissions paid for maintenance services contracts in excess of one year. Following the adoption of Topic 606, the revenue recognition for the Company’s other sales arrangements remained materially consistent with our historical practice.

Upon adoption of Topic 606, we applied the standard’s practical expedients that allows a) an entity to use the transaction price at the date the contract was completed rather than estimating variable consideration amounts in the comparative reporting periods, b) that permits the omission of prior-period information about our performance obligations, and c) that allows the Company to reflect the aggregate effect of all modifications that occur before the beginning of the earliest period presented when identifying the satisfied and unsatisfied performance obligations, determining the transaction price and allocating the transaction price to the satisfied and unsatisfied performance obligations.

See the tables at the end of this note for the effects of the adoption of Topic 606 on our condensed consolidated financial statements as of June 30, 2017, and for the three and nine months ended March 31, 2018 and 2017. See Note 3. “Summary of Significant Accounting Policies” to our condensed consolidated financial statements for further discussion of the effects of the adoption of Topic 606 on our significant accounting policies.

Adjustments to Previously Reported Financial Statements from the Adoption of Accounting Pronouncements

The following table presents the effect of the adoption of Topic 606 on our condensed consolidated balance sheet (unaudited) as of June 30, 2017, (in thousands):

	As of June 30, 2017
	As Reported			Adjustment			As Adjusted
Accounts receivable, net	$	120,770		$	(27,655	)	$	93,115
Inventories		45,880			1,530			47,410
Total current assets		324,967			(26,125	)		298,842
Other assets		22,586			2,479			25,065
Total assets		483,346			(23,646	)		459,700

Accrued warranty		10,007			577			10,584
Other accrued liabilities		36,713			331			37,044
Deferred distributors revenue, net of cost of sales to distributors		43,525			(43,525	)		—
Total current liabilities		255,822			(42,617	)		213,205

Accumulated deficit		(800,257	)		18,971			(781,286	)
Total stockholders’ equity		106,707			18,971			125,678
Total liabilities and stockholders’ equity	$	483,346		$	(23,646	)	$	459,700

The following tables present the effect of the adoption of Topic 606 on our condensed consolidated statements of operations (unaudited) for the three and nine months ended March 31, 2017 (in thousands, except per share amounts):

	Three Months Ended March 31, 2017
	As Reported			Adjustment			As Adjusted
Net revenues
Product	$	110,789		$	532		$	111,321
Service		37,875			—			37,875
Total net revenues		148,664			532			149,196

Cost of revenues
Product		52,401			(126	)		52,275
Service		14,117			—			14,117
Total cost of revenues		66,518			(126	)		66,392

Gross profit
Product		58,388			658			59,046
Service		23,758			—			23,758
Total Gross profit		82,146			658			82,804

Sales and marketing expenses		38,759			31			38,790
Operating loss		(3,246	)		627			(2,619	)
Net loss before tax		(4,438	)		627			(3,811	)
Net loss	$	(5,604	)	$	627		$	(4,977	)

Basic and diluted net loss per share
Net loss per share - basic	$	(0.05	)				$	(0.05	)
Net loss per share - diluted	$	(0.05	)				$	(0.05	)

Shares used in per share calculation - basic		109,213						109,213
Shares used in per share calculation - diluted		109,213						109,213

	Nine Months Ended March 31, 2017
	As Reported			Adjustment			As Adjusted
Net revenues
Product	$	310,709		$	8,760		$	319,469
Service		108,708			—			108,708
Total net revenues		419,417			8,760			428,177

Cost of revenues
Product		155,987			3,164			159,151
Service		40,684			—			40,684
Total cost of revenues		196,671			3,164			199,835

Gross profit
Product		154,722			5,596			160,318
Service		68,024			—			68,024
Total Gross profit		222,746			5,596			228,342

Sales and marketing expenses		116,824			(150	)		116,674
Operating loss		(15,367	)		5,746			(9,621	)
Net loss before tax		(17,442	)		5,746			(11,696	)
Net loss	$	(20,694	)	$	5,746		$	(14,948	)

Basic and diluted net loss per share
Net loss per share - basic	$	(0.19	)				$	(0.14	)
Net loss per share - diluted	$	(0.19	)				$	(0.14	)

Shares used in per share calculation - basic		107,531						107,531
Shares used in per share calculation - diluted		107,531						107,531

The following tables present the effect of the adoption of Topic 606 on our condensed consolidated statement of cash flows (unaudited) for the nine months ended March 31, 2017 (in thousands):

	Nine Months Ended March 31, 2017
	As Reported			Adjustment			As Adjusted
Cash flows from operating activities
Net loss	$	(20,694	)	$	5,746		$	(14,948	)
Changes in operating assets and liabilities, net
Accounts receivable		(5,926	)		13,158			7,232
Inventories		6,344			(1,620	)		4,724
Prepaid expenses and other assets		8,181			(150	)		8,031
Deferred distributors revenue, net of cost of sales to distributors		17,441			(17,441	)		—
Other current and long-term liabilities		5,887			307			6,194
Net cash provided by operating activities		43,961			—			43,961
Cash flows from investing activities		(69,159	)		—			(69,159	)
Cash flows from financing activities		48,328			—			48,328
Foreign currency effect on cash		28			—			28
Net increase in cash and cash equivalents	$	23,158		$	—		$	23,158

Balance Sheet Accounts

9 Months Ended

Mar. 31, 2018

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Balance Sheet Accounts

5.	Balance Sheet Accounts

Cash, Cash Equivalents and Marketable Securities

The following is a summary of cash, cash equivalents and marketable securities (in thousands):

	March 31, 2018		June 30, 2017
Cash	$	98,677	$	126,159
Cash equivalents		4,500		4,291
Total cash and cash equivalents		103,177		130,450
Marketable securities (consisting of available-for-sale securities)		2,091		—
Total cash, cash equivalents and marketable securities	$	105,268	$	130,450

The Company considers highly liquid investments with maturities of three months or less at the date of purchase to be cash equivalents. Marketable securities are recorded in “Prepaid expense and other current assets” in the accompanying condensed consolidated balance sheet as these are publicly-traded equity securities. Marketable securities are classified as available-for-sale and reported at fair value with unrealized gains and losses included in “Accumulated other comprehensive loss” in the accompanying condensed consolidated balance sheets.

Inventories

The Company values its inventory at lower of cost or net realizable value. Cost is computed using standard cost, which approximates actual cost, on a first-in, first-out basis. The Company has established inventory allowances primarily determined by the demand of inventory or when conditions exist that suggest that inventory may be in excess of anticipated demand or is obsolete based upon assumptions about future demand. At the point of the loss recognition, a new, lower-cost basis for that inventory is established, and subsequent changes in facts and circumstances do not result in the restoration or increase in that newly established cost basis. Any written down or obsolete inventory subsequently sold has not had a material impact on gross margin for any of the periods disclosed.

Inventories consist of the following (in thousands):

	March 31, 2018		June 30, 2017
			(As Adjusted)
Finished goods	$	63,306	$	46,620
Raw materials		14,450		790
Total Inventories	$	77,756	$	47,410

Property and Equipment, Net

Property and equipment consist of the following (in thousands):

	March 31, 2018			June 30, 2017
Computers and equipment	$	69,712		$	34,716
Purchased software		16,908			11,785
Office equipment, furniture and fixtures		18,143			10,852
Leasehold improvements		47,039			23,046
Total property and equipment		151,802			80,399
Less: accumulated depreciation and amortization		(65,315	)		(50,159	)
Property and equipment, net	$	86,487		$	30,240

Intangibles

The following tables summarize the components of gross and net intangible asset balances (dollars in thousands)

	Weighted Average
	Remaining Amortization	Gross Carrying		Accumulated		Net Carrying
	Period	Amount		Amortization		Amount
March 31, 2018
Developed technology	3.8 years	$	117,500	$	52,860	$	64,640
Customer relationships	3.7 years		51,639		39,577		12,062
Maintenance contracts	0.6 years		17,000		15,016		1,984
Trade names	3.7 years		9,100		3,776		5,324
Backlogs	— years		1,800		1,800		—
License agreements	5.9 years		2,445		1,323		1,122
Other intangibles	1.9 years		1,382		1,108		274
Total intangibles, net		$	200,866	$	115,460	$	85,406

	Weighted Average
	Remaining Amortization	Gross Carrying		Accumulated		Net Carrying
	Period	Amount		Amortization		Amount
June 30, 2017
Developed technology	5.3 years	$	55,400	$	42,689	$	12,711
Customer relationships	3.3 years		40,300		37,567		2,733
Maintenance contracts	1.3 years		17,000		12,467		4,533
Trade names	4.3 years		5,100		2,846		2,254
License agreements	6.4 years		2,445		1,120		1,325
Other intangibles	2.7 years		1,382		1,001		381
Total intangibles, net with finite lives			121,627		97,690		23,937
In-process research and development, with indefinite life			1,400		—		1,400
Total intangibles, net		$	123,027	$	97,690	$	25,337

During the three months ended September 30, 2017, in-process research and development of $1.4 million included in the above table was reclassified to developed technology upon completion of the project and is being amortized over its estimated useful life.

The amortization expense of intangibles for the periods presented is summarized below (in thousands):

	Three Months Ended				Nine Months Ended
	March 31, 2018		March 31, 2017		March 31, 2018		March 31, 2017
Amortization in “Cost of revenues: Product”	$	4,647	$	995	$	11,310	$	6,271
Amortization of intangibles		2,101		1,193		6,461		7,510
Total amortization	$	6,748	$	2,188	$	17,771	$	13,781

The amortization expense that is recognized in “Cost of revenues: Product” is comprised of amortization for developed technology, license agreements and other intangibles.

Goodwill

The following table summarizes goodwill for the periods presented (in thousands):

	March 31, 2018
Balance as of June 30, 2017	$	80,216
Additions due to acquisitions		49,028
Balance at end of period	$	129,244

During the nine months ended March 31, 2018, the Company completed acquisitions of the Campus Fabric Business and the Data Center Business, resulting in an additional goodwill of $36.4 million and $12.6 million, respectively. See Note 2 for additional information related to the acquisitions.

Deferred Revenue

The Company offers for sale to its customers, renewable support arrangements that range from one to five years as well as professional and training services, which results in deferred revenue.

Debt

The Company’s debt is comprised of the following (in thousands):

	March 31, 2018			June 30, 2017
Current portion of long-term debt:
Term Loan	$	25,260		$	12,444
Less: unamortized debt issuance costs		(540	)		(164	)
Current portion of long-term debt	$	24,720		$	12,280

Long-term debt, less current portion:
Term Loan	$	145,173		$	71,268
Revolver		10,000			10,000
Less: unamortized debt issuance costs		(1,215	)		(846	)
Total long-term debt, less current portion		153,958			80,422
Total debt	$	178,678		$	92,702

In connection with the closing of Campus Fabric Business discussed in Note 2, the Company entered into the Second Amendment to the Amended and Restated Credit Agreement (“Second Amendment”), which amended the Amended and Restated Credit Agreement, dated as of October 28, 2016 (the “Credit Facility”), by and among the Company, as borrower, Silicon Valley Bank, as administrative agent and collateral agent, and lenders. Among other things, the Second Amendment (i) increased the amount of the available borrowing under the Credit Facility from $140.5 million to $243.7 million, composed of (a) the five-year term loan (“Term Loan”) in a principal amount of up to $183.7 million and (b) the five-year revolving credit facility (“Revolver”) in a principal amount of up to $60.0 million, (ii) extends the maturity date under the existing Term Loan and the termination date under the existing Revolver, (iii) provides for an uncommitted additional incremental loan facility in the principal amount of up to $50.0 million (“Incremental Facility”), and (iv) joins certain additional banks, financial institutions and institutional lenders as lenders pursuant to the terms of the Credit Facility. On July 14, 2017, the Company borrowed $80.0 million under the Term Loan which was used to fund the purchase of Campus Fabric Business.

In connection with the closing of the acquisition of the Data Center Business discussed in Note 2, the Company entered into the Third Amendment to the Credit Facility (the “Third Amendment”) on October 26, 2017. Among other things, the Third Amendment (i) amends the negative covenant governing dispositions to increase the general dispositions basket for the fiscal year of the Company ending June 30, 2018, and (ii) amends certain definitions and provisions to update certain references to the Data Center Business Purchase Agreement (as defined above). On the Data Center Business Closing Date, the Company borrowed $20.0 million on the Term Loan to partially fund the acquisition of the Data Center Business.

Borrowings under the Term Loan bear interest, at our option, at a rate equal to either the LIBOR rate (subject to a 0.0% LIBOR floor), plus an applicable margin (currently 3.25% per annum based on a stated consolidated leverage ratio) or the adjusted base rate, plus an applicable margin (currently 1.25% per annum based on the Company’s consolidated leverage ratio). Borrowings under the Revolver bear interest, at the Company’s option, at a rate equal to either the LIBOR rate (subject to a 0.0% LIBOR floor), plus an applicable margin (currently 3.25% per annum based on a stated consolidated leverage ratio) or the adjusted base rate, plus an applicable margin (currently 1.25% per annum based on a stated consolidated leverage ratio). The Revolver has a commitment fee payable on the undrawn amount ranging from 0.375% to 0.50% per annum based upon a stated consolidated leverage ratio.

The Company had $1.2 million of outstanding letters of credit and $48.8 million of availability under the Revolver as of March 31, 2018.

On May 1, 2018, the Company terminated the Credit Facility.

On May 1, 2018, the Company entered into a Credit Agreement (the “New Credit Agreement”), by and among the Company, as borrower, BMO Harris Bank N.A., as an issuing lender and swingline lender, Bank of Montreal, as administrative and collateral agent, and the financial institutions or entities that are a party thereto as lenders. The New Credit Agreement provides for a $40 million five-year revolving credit facility (the “New Revolver”) and a $190 million five-year term loan (the “New Term Loan” and together with the New Revolver, the “New Senior Secured Credit Facilities”). On May 1, 2018, the Company borrowed $200 million under the New Senior Secured Credit Facilities in order to pay off existing debt and for general corporate purposes.

See Note 14 (Subsequent Events) to the condensed consolidated financial statements for more information on the New Credit Agreement.

Guarantees and Product Warranties

Networking products may contain undetected hardware or software errors when new products or new versions or updates of existing products are released to the marketplace. The Company’s standard hardware warranty period is typically 12 months from the date of shipment to end-users and 90 days for software. For certain access products, the Company offers a limited lifetime hardware warranty commencing on the date of shipment from the Company and ending five (5) years following the Company’s announcement of the end of sale of such product. Upon shipment of products to its customers, the Company estimates expenses for the cost to repair or replace products that may be returned under warranty and accrue a liability in cost of product revenue for this amount. The determination of the Company’s warranty requirements is based on actual historical experience with the product or product family, estimates of repair and replacement costs and any product warranty problems that are identified after shipment. The Company estimates and adjusts these accruals at each balance sheet date in accordance with changes in these factors.

Upon issuance of a standard product warranty, the Company discloses and recognizes a liability for the obligations it assumes under the product warranty. The following table summarizes the activity related to the Company’s product warranty liability during the three and nine months ended March 31, 2018 and 2017 (in thousands):

	Three Months Ended						Nine Months Ended
	March 31, 2018			March 31, 2017			March 31, 2018			March 31, 2017
				(As adjusted)						(As adjusted)
Balance beginning of period	$	13,010		$	10,790		$	10,584		$	9,998
Warranties assumed due to acquisitions		—			—			3,682			2,034
New warranties issued		2,872			1,893			6,801			3,997
Warranty expenditures		(3,070	)		(2,080	)		(8,255	)		(5,426	)
Balance end of period	$	12,812		$	10,603		$	12,812		$	10,603

To facilitate sales of its products in the normal course of business, the Company indemnifies its resellers and end-user customers with respect to certain matters. The Company has agreed to hold the customer harmless against losses arising from a breach of intellectual property infringement or other. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. It is not possible to estimate the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. Historically, payments made by the Company under these agreements have not had a material impact on its operating results or financial position.

Other long-term liabilities

The following is a summary of long-term liabilities (in thousands):

	March 31, 2018		June 30, 2017
Acquisition related deferred payments, less current portion	$	14,147	$	—
Acquisition-related contingent consideration obligations, less current portion		33,256		—
Other		18,037		8,526
Total other long-term liabilities	$	65,440	$	8,526

Advertising

All advertising costs are expensed as incurred. Advertising expenses for three and nine months ended March 31, 2018 and 2017, were immaterial.

Concentrations

The Company may be subject to concentration of credit risk as a result of certain financial instruments consisting of accounts receivable and marketable securities. The Company does not invest an amount exceeding 10% of its combined cash or cash equivalents in the securities of any one obligor or maker, except for obligations of the United States government, obligations of United States government agencies and money market accounts.

The Company performs ongoing credit evaluations of its customers and generally does not require collateral in exchange for credit.

The following table sets forth major customers accounting for 10% or more of our net revenues:

	Three Months Ended		Nine Months Ended
	March 31, 2018	March 31, 2017	March 31, 2018	March 31, 2017
		(As adjusted)		(As adjusted)
Westcon Group Inc.	14%	10%	14%	11%
Tech Data Corporation	14%	13%	13%	15%
Jenne Corporation	13%	14%	11%	14%

The following customers account for more than 10% of the Company’s accounts receivable outstanding as of March 31, 2018, Tech Data 18% and Westcon Group 14%

Fair Value Measurements

9 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

6.	Fair Value Measurements

A three-tier fair value hierarchy is utilized to prioritize the inputs used in measuring fair value. The hierarchy gives the highest priority to quoted prices in active markets (Level 1) and the lowest priority to unobservable inputs (Level 3). The three levels are defined as follows:

•

Level 1 Inputs - unadjusted quoted prices in active markets for identical assets or liabilities;

•

Level 2 Inputs - quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument; and

•

Level 3 Inputs - unobservable inputs reflecting the Company’s own assumptions in measuring the asset or liability at fair value.

The following table presents the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis (in thousands):

March 31, 2018	Level 1		Level 2		Level 3		Total
Assets
Investments:
Money market funds	$	4,500	$	—	$	—	$	4,500
Marketable securities		2,091		—		—		2,091
Total assets measured at fair value	$	6,591	$	—	$	—	$	6,591
Liabilities
Acquisition-related contingent consideration obligations	$	—	$	—	$	46,526	$	46,526
Total liabilities measured at fair value	$	—	$	—	$	46,526	$	46,526

June 30, 2017	Level 1		Level 2		Level 3		Total
Assets
Investments:
Money market funds	$	4,291	$	—	$	—	$	4,291
Investment in non-marketable equity		—		—		3,000		3,000
Total assets measured at fair value	$	4,291	$	—	$	3,000	$	7,291

Level 1 investments:

The Company holds investments in equity securities acquired from the sale of an investment in non-marketable equity securities during the first quarter of fiscal 2018, which is classified as available-for-sale marketable securities at Level 1 as the investments have readily determinable fair value (see below, Level 3 investments). An unrealized holding gain on the investments was $0.7 million as of March 31, 2018.

Level 2 assets and liabilities:

The Company includes U.S. government and sovereign obligations, most government agency securities, investment-grade corporate bonds, and state, municipal and provincial obligations for which quoted prices are available as Level 2. There were no transfers of assets or liabilities between Level 1 and Level 2 for the periods presented.

The fair value of the borrowings under the Credit Facility is estimated based on valuations provided by alternative pricing sources supported by observable inputs which is considered Level 2. Due to the short duration until maturity of the credit facility, the fair value approximates the face amount of the Company’s indebtedness of $178.7 million and $93.7 million as of March 31, 2018 and June 30, 2017, respectively. Such differences are immaterial for all periods presented.

Level 3 assets and liabilities:

Certain of the Company’s assets, including intangible assets and goodwill are measured at fair value on a non-recurring basis if impairment is indicated.

As of June 30, 2017, the Company reflected its non-marketable equity investment as Level 3 in the fair value hierarchy as it is based on unobservable inputs that market participants would use in pricing this asset due to the absence of recent comparable market transactions and inherent lack of liquidity. During fiscal 2015, the Company purchased a $3.0 million equity interest in a company that operated in the enterprise software platform industry. The Company did not enter into any other transactions with the investee during fiscal 2017 or the first quarter of fiscal 2018. During the three months ended September 30, 2017, the investee was acquired by a third party. The Company received $6.8 million as consideration for its equity interest in the investee, including $5.4 million in cash and 65,937 shares of the third party’s publicly-traded common stock with a market value of $1.4 million. During the first quarter of fiscal 2018, the Company received $5.8 million of the consideration, consisting of $4.9 million in cash and 41,685 shares with a market value of $0.9 million. The remainder of the consideration consisting of $0.5 million of cash and $0.5 million of shares will remain in escrow for a period of 18 months from the date of sales for general representations and warranties. A gain of $3.8 million related to this sale was recorded in “Other income (expense), net” in the accompanying condensed consolidated statement of operations for the nine months ended March 31, 2018. The 41,685 shares received and 23,252 shares held in escrow as of March 31, 2018 were considered Level 1 investments as these have readily determinable fair value and quoted prices in active markets.

During the quarter ended December 31, 2017, the Company recorded a liability for contingent consideration related to its acquisitions of the Data Center Business and the CF Business (see Note 2 for additional information related to the acquisitions). The fair value measurement of the contingent consideration obligations is determined using Level 3 inputs. The fair value of contingent consideration obligations is based on a discounted cash flow model. These fair value measurements represent Level 3 measurements as they are based on significant inputs not observable in the market. Significant judgment is employed in determining the appropriateness of these assumptions as of the acquisition date and for each subsequent period. Accordingly, changes in assumptions could have a material impact on the amount of contingent consideration expense the Company records in any given period. Changes in the value of the contingent consideration obligations would be recorded in general and administrative expenses in the accompanying condensed consolidated statements of operations.

The change in the acquisition-related contingent consideration obligations is as follows (in thousands):

	Three Months Ended			Nine Months Ended
	March 31, 2018			March 31, 2018
Beginning balance	$	47,030		$	—
Initial fair value measurements		—			47,030
Payments		(671	)		(671	)
Accretion on discount		1,401			1,401
Change in fair value		(1,234	)		(1,234	)
Ending balance	$	46,526		$	46,526

There were no transfers of assets or liabilities between Level 2 and Level 3 during the first nine months of fiscal year 2018 or 2017. There were no impairments recorded for the first nine months of fiscal 2018 or 2017.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Share-based Compensation

9 Months Ended

Mar. 31, 2018

Share Based Compensation [Abstract]

Share-based Compensation

7.Share-based Compensation

Shares reserved for issuance

The Company had reserved for issuance for the periods noted (in thousands):

	March 31, 2018		June 30, 2017
2014 Employee Stock Purchase Plan		5,365		7,785
Employee stock options and awards outstanding		10,405		9,726
2013 Equity Incentive Plan shares available for grant		11,944		7,629
Total shares reserved for issuance		27,714		25,140

Share-based compensation expense recognized in the condensed consolidated financial statements by line item caption is as follows (in thousands):

	Three Months Ended				Nine Months Ended
	March 31, 2018		March 31, 2017		March 31, 2018		March 31, 2017
Cost of product revenue	$	163	$	73	$	389	$	262
Cost of service revenue		354		56		783		475
Research and development		2,367		625		5,247		2,593
Sales and marketing		2,735		809		7,077		3,129
General and administrative		2,199		911		6,150		2,869
Total share-based compensation expense	$	7,818	$	2,474	$	19,646	$	9,328

During the nine months ended March 31, 2018 or 2017, the Company did not capitalize any share-based compensation expense in inventory, as the amounts were immaterial.

Stock Awards

Stock awards may be granted under the 2013 Equity Incentive Plan (the “2013 Plan”) on terms approved by the Compensation Committee of the Board of Directors. Stock awards generally provide for the issuance of restricted stock units (“RSUs”) including performance or market-based RSUs which vest over a fixed period of time or based upon the satisfaction of certain performance criteria. The Company uses the straight-line method for expense attribution, and beginning with fiscal 2017, the Company does not estimate forfeitures, but accounts for them as incurred.

The following table summarizes stock award activity for the nine months ended March 31, 2018 (in thousands, except grant date fair value):

	Number of Shares			Weighted- Average Grant Date Fair Value		Aggregate Fair Market Value
Non-vested stock awards outstanding at June 30, 2017		6,664		$	4.66	$	61,440
Granted		4,335			11.26
Vested		(2,488	)		3.75
Cancelled		(374	)		7.23
Non-vested stock awards outstanding at March 31, 2018		8,137		$	8.34	$	90,084

The following table summarizes stock option activity for the nine months ended March 31, 2018 (in thousands, except per share and contractual term):

	Number of Shares			Weighted-Average Exercise Price Per Share		Weighted-Average Remaining Contractual Term (years)		Aggregate Intrinsic Value
Options outstanding at June 30, 2017		3,062		$	4.06		4.19	$	15,868
Exercised		(779	)		4.56
Cancelled		(15	)		4.25
Options outstanding at March 31, 2018		2,268		$	3.89		3.11	$	16,283
Vested and expected to vest at March 31, 2018		2,268		$	3.89		3.11	$	16,283
Exercisable at March 31, 2018		1,961		$	4.10		2.95	$	13,670

The fair value of each stock option grant under the 2013 Plan and 2005 Equity Incentive Plan is estimated on the date of grant using the Black-Scholes-Merton option valuation model with the weighted average assumptions noted in the following table. The Company uses the Monte-Carlo simulation model to determine the fair value and the derived service period of stock awards with market conditions, on the date of the grant. The expected term of options granted is derived from historical data on employee exercise and post-vesting employment termination behavior. The risk-free rate is based upon the estimated life of the option and the U.S. Treasury yield curve in effect at the time of grant. Expected volatility is based on the historical volatility on the Company’s stock.

The fair value of each RSUs grant with performance-based vesting criteria (“PSUs”) under the 2013 Plan is estimated on the date of grant using the Monte-Carlo simulation model to determine the fair value and the derived service period of stock awards with market conditions, on the date of the grant.

During the first quarter of fiscal 2018, the Company approved the grant of 1,154,014 stock awards to its vice president level employees or above (“VPs”), including 560,344 stock awards to its Executive Officers, and 939,925 stock awards to its other employees. Fifty percent (50%) of the stock awards granted to the VPs, except the chief executive officer, were in the form of PSUs, with grant date fair values of $10.90, and fifty percent (50%) of the stock awards granted were in the form of service-based RSUs. The Company’s chief executive officer received sixty percent (60%) of his stock award grant in the form of PSUs, while forty percent (40%) of this award were in the form of RSUs, with a grant date fair value of $10.90. The RSUs vest from the original grant date as to one-third (1/3) on the one-year anniversary and one-twelfth (1/12) each quarter thereafter, subject to continued service to the Company. No PSUs were granted during the second quarter of fiscal 2018.

For the PSUs referenced in the preceding paragraph, they will be considered earned once the Company’s combined earnings per share equals or exceeds $0.32 for two consecutive quarters (the “FY18 Performance Threshold”). Upon satisfying the FY18 Performance Threshold, the PSUs shall vest with respect to the same number of RSUs that have vested which were granted on the same date and thereafter, shall vest on the same schedule as the RSUs, subject to continued service to the Company. If the FY18 Performance Threshold is not met by the third anniversary of the grant date the award is canceled. In addition, the FY18 Performance Threshold shall be deemed satisfied upon the closing of a Change in Control (within the meaning of the Company’s 2013 Equity Incentive Plan) in the event the per share consideration received by the Company’s stockholders equals or exceeds $16.00 per share.

During the three and nine months ended March 31, 2018, none of the PSU grants referenced above achieved their FY18 Performance Threshold.

During the third quarter of fiscal 2018, the Company approved the grant of 100,000 stock awards with market-based vesting criteria to certain VPs with grant date fair values ranging from $10.61 to $12.19 determined by using the Monte-Carlo simulation model.

During the first quarter of fiscal 2017, the Company approved the grant of 1,505,120 stock awards to its VPs, including 680,000 stock awards to its Executive Officers, and 1,053,300 stock awards to other Company employees. Fifty percent (50%) of the stock awards granted to the VPs were in the form of PSUs, with grant date fair values ranging from $3.02 to $3.09, and fifty percent (50%) of the stock awards granted were in the form of RSUs. The RSUs vest from the original grant date as to one-third (1/3) on the one-year anniversary and one-twelfth (1/12) each quarter thereafter, subject to continued service to the Company. No PSUs were granted during the second quarter of fiscal 2017.

The PSUs were considered earned once the Company’s stock price equaled or exceeded $5.00 per share for 30 consecutive trading days after January 1, 2017 (the “FY17 Performance Threshold”). Once the FY17 Performance Threshold goal was attainted the PSUs began to vest on the same schedule as the RSUs that were granted at the same time, subject to continued service to the Company.

During the quarter ended March 31, 2017, all of the PSU grants referenced above achieved their FY17 Performance Threshold and as such, began vesting and will be released on the schedule as noted, subject to continued service to the Company.

The fair value of each share purchase option under the Company’s 2014 Employee Stock Purchase Plan (“ESPP”) is estimated on the date of grant using the Black-Scholes-Merton option valuation model with the weighted average assumptions noted in the following table. The expected term of the ESPP represents the term of the offering period of each option. The risk-free rate is based upon the estimated life and on the U.S. Treasury yield curve in effect at the time of grant. Expected volatility is based on the historical volatility on the Company’s stock.

There were 1,151,759 and 1,114,707 shares issued under the ESPP during the three months ended March 31, 2018 and 2017, respectively. There were 2,419,689 and 2,218,306 shares issued under the ESPP during the nine months ended March 31, 2018 and 2017, respectively. The following assumptions were used to calculate the fair value of shares granted under the ESPP during the following periods:

	Three Months Ended						Nine Months Ended
	March 31, 2018			March 31, 2017			March 31, 2018			March 31, 2017
Expected life	0.5 years			0.5 years			0.5 years			0.5 years
Risk-free interest rate		1.15	%		0.40	%	1.64%–1.15%				0.40	%
Volatility		42	%		37	%		42	%	40%–37%
Dividend yield		—	%		—	%		—	%		—	%

The weighted-average fair value of shares granted under the ESPP during the three months ended March 31, 2018 and 2017 was $4.00 and $1.34, respectively. The weighted-average fair value of shares granted under the ESPP during the nine months ended March 31, 2018 and 2017 was $3.26 and $1.24, respectively.

Restructuring Charges

9 Months Ended

Mar. 31, 2018

Restructuring And Related Activities [Abstract]

Restructuring Charges

8.	Restructuring Charges

2018 Restructuring

In the third quarter of fiscal 2018, the Company announced and began executing a reduction-in-force (the “2018 Restructuring”) to re-align the Company’s resources as a result of the Company’s recent acquisitions of the Campus Fabric Business and the Data Center Business. The Company recorded $4.9 million related to employee severance and benefits expenses during the three months ended March 31, 2018.

2017 Restructuring

The Company recorded restructuring charges, net of $7.7 million and $9.6 million for the three and nine months ended March 31, 2017, respectively. Pursuant with the WLAN Business acquisition from Zebra, the Company assumed a facility lease located at and transferred its headquarters to 6480 Via del Oro, San Jose, California. The Company consolidated its existing workforce from the Company’s previous headquarters location on Rio Robles Drive in San Jose, California, with employees assumed from Zebra at the Via del Oro site and exited the Rio Robles site on January 31, 2017. Due to the Company’s cease use of the Rio Robles facility and abandonment of all leasehold improvements, it accelerated the amortization of the remaining leasehold improvements balance for this site over the shortened service period such that the leasehold improvements were fully amortized on the cease-use date. The Company recorded accelerated amortization expense for the three and nine months ended March 31, 2017 of $0.9 million and $2.6 million respectively, and it is reflected in “Restructuring and related charges, net of reversals” in the condensed consolidated statements of operations.

The Company entered into an agreement to sublease its Rio Robles California site during the third quarter of fiscal 2017. The sublease is for the remaining duration of the Company’s lease. The sublease resulted in adjustments to the prior estimates for the amount of sublease payments, timing of sublease activities and real estate commissions associated with the sublease. The net adjustments resulted in a charge of $1.5 million during the third quarter of fiscal 2017. Previously, in the second quarter of fiscal 2017, the Company had modified its estimated future obligations for non-cancelable lease payments and related future sub-leasing income and recorded charges of $0.1 million. The excess facilities payments will continue through fiscal year 2023, due to the length of the lease agreements.

In conjunction with the above noted actions, the Company announced a reduction-in-force during the quarter ended March 31, 2017 affecting 90 employees. The Company recorded $5.3 million in severance and benefits charges during the period.

Restructuring liabilities consisted of obligations pertaining to the estimated future obligations for non-cancelable lease payments, as well as severance and benefits obligations. The restructuring liabilities are recorded in “Other accrued liabilities” and “Other long-term liabilities” in the accompanying condensed consolidated balance sheets.

Total restructuring and related liabilities consist of (in thousands):

	Excess Facilities			Severance Benefits			Other			Total
Balance as of June 30, 2017	$	2,184		$	1,853		$	85		$	4,122
Period charges		—			4,920			—			4,920
Period payments		(516	)		(4,198	)		(73	)		(4,787	)
Balance as of March 31, 2018	$	1,668		$	2,575		$	12		$	4,255
Less: current portion included in Other accrued liabilities											2,920
Restructuring accrual included in Other long-term liabilities										$	1,335

Commitments and Contingencies

9 Months Ended

Mar. 31, 2018

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

9.	Commitments and Contingencies

Purchase Commitments

The Company currently has arrangements with contract manufacturers and suppliers for the manufacture of its products. Those arrangements allow the contract manufactures to procure long lead-time component inventory based upon a rolling production forecast provided by the Company. The Company is obligated to purchase long lead-time component inventory that its contract manufacturer procures in accordance with the Company’s forecast, unless the Company gives notice of order cancellation outside of applicable component lead-times. As of March 31, 2018, the Company had non-cancelable commitments to purchase $151.5 million of such inventory. As of March 31, 2018 the Company had non-cancelable software and maintenance support commitments to purchase $17.5 million of software and support services.

Legal Proceedings

The Company may from time to time be party to litigation arising in the course of its business, including, without limitation, allegations relating to commercial transactions, business relationships or intellectual property rights. Such claims, even if not meritorious, could result in the expenditure of significant financial and managerial resources. Litigation in general, and intellectual property and securities litigation in particular, can be expensive and disruptive to normal business operations. Moreover, the results of legal proceedings are difficult to predict.

In accordance with applicable accounting guidance, the Company records accruals for certain of its outstanding legal proceedings, investigations or claims when it is probable that a liability will be incurred and the amount of loss can be reasonably estimated. The Company evaluates, at least on a quarterly basis, developments in legal proceedings, investigations or claims that could affect the amount of any accrual, as well as any developments that would result in a loss contingency to become both probable and reasonably estimable. When a loss contingency is not both probable and reasonably estimable, the Company does not record a loss accrual. However, if the loss (or an additional loss in excess of any prior accrual) is at least a reasonable possibility and material, then the Company would disclose an estimate of the possible loss or range of loss, if such estimate can be made, or disclose that an estimate cannot be made. The assessment whether a loss is probable or a reasonable possibility, and whether the loss or a range of loss is estimable, involves a series of complex judgments about future events. Even if a loss is reasonably possible, the Company may not be able to estimate a range of possible loss, particularly where (i) the damages sought are substantial or indeterminate, (ii) the proceedings are in the early stages, or (iii) the matters involve novel or unsettled legal theories or a large number of parties. In such cases, there is considerable uncertainty regarding the ultimate resolution of such matters, including the amount of any possible loss, fine or penalty. Accordingly, for current proceedings, except as noted below, the Company is currently unable to estimate any reasonably possible loss or range of possible loss. However, an adverse resolution of one or more of such matters could have a material adverse effect on the Company's results of operations in a particular quarter or fiscal year.

Brazilian Tax Assessment Matter

On May 28, 2007, the Public Treasury Department of the State of Sao Paolo, Brazil (the “Tax Authority”) assessed our Brazilian subsidiary, Enterasys Networks do Brasil Ltda. (“Enterasys Brasil”), based on an alleged underpayment of taxes. The Tax Authority also charged interest and penalties with respect to the assessment (collectively, the “ICMS Tax Assessment”). The Tax Authority denied Enterasys Brasil the use of certain presumed tax credits granted by the State of Espirito Santo, Brazil under the terms of the FUNDAP program for the period from February 2003 to December 2004. The value of the disallowed presumed tax credits is BRL 3.4 million (approximately U.S. $1.0 million), excluding interest and penalties. All currency conversions in this Legal Proceedings section are as of March 31, 2018.

Unable to resolve the matter at the administrative level, on October 1, 2014, Enterasys Brasil filed a lawsuit in the 11th Public Treasury Court of the Sao Paolo State Court of Justice (Judiciary District of Sao Paolo) to overturn or reduce the ICMS Tax Assessment. As part of this lawsuit, Enterasys Brasil requested a stay of execution, so that no tax foreclosure could be filed and no guarantee would be required until the court issued its final ruling. On or about October 6, 2014, the court granted a preliminary injunction staying any execution on the assessment, but requiring that Enterasys Brasil deposit the assessed amount with the court. Enterasys Brasil appealed this ruling and, on or about January 28, 2015, the appellate court ruled that no cash deposit (or guarantee) was required. In a decision dated August 28, 2017, and published on October 3, 2017, the court validated the assessment and penalty imposed by the Tax Authority, but ruled that the Tax Authority was charging an unlawfully high interest rate on the tax assessment and penalty amounts, and ordered the interest rate reduced to the maximum Federal rate. The August 28, 2017 decision, were it to become final, would require Enterasys Brasil to pay a total of BRL 16.8 million (approximately U.S. $5.1 million), which includes penalties, court costs, attorneys’ fees, and accrued interest as of March 31, 2018. The Company believes the ICMS Tax Assessment against Enterasys Brasil is without merit, and has appealed the lower court’s decision. The appellate court ruled that no cash deposit (or guarantee) is required during the pendency of the appeal.

Based on the currently available information, the Company believes the ultimate outcome of the ICMS Tax Assessment litigation will not have a material adverse effect on the Company's financial position or overall results of operations. However, due to the complexities and uncertainty surrounding the judicial process in Brazil and the nature of the claims asserted, there can be no assurance of a favorable outcome for Enterasys Brasil, which recorded an accrual of BRL 9.4 million (approximately U.S. $2.8 million) as of the date the Company acquired Enterasys Networks.

The Company made a demand on April 11, 2014 for a defense from, and indemnification by, the former equity holder of Enterasys Networks, Inc. (“Seller”) in connection with the ICMS Tax Assessment. Seller agreed to assume the defense of the ICMS Tax Assessment on May 20, 2014. In addition, through the settlement of an indemnification-related lawsuit with the Seller on June 18, 2015, Seller agreed to continue to defend the Company with respect to the ICMS Tax Assessment and to indemnify the Company for losses related thereto subject to certain conditions. These conditions include the offsetting of foreign income tax benefits realized by the Company in connection with the acquisition of Enterasys. Based upon current projections of the foreign income tax benefits to be realized, and the potential liability in the event of an adverse final judgment in the ICMS Tax Assessment litigation, the Company does not presently anticipate that any amounts under the indemnification will be due from the Seller in connection with the ICMS Tax Assessment.

In re Extreme Networks, Inc. Securities Litigation

On October 23 and 29, 2015, punitive class action complaints alleging violations of securities laws were filed in the U.S. District Court for the Northern District of California against the Company and three of its former officers (Charles W. Berger, Kenneth B. Arola, and John T. Kurtzweil). Subsequently, the cases were consolidated (In re Extreme Networks, Inc. Securities Litigation, No. 3:15-CY-04883-BLF). Plaintiffs allege that defendants violated the securities laws by disseminating materially false and misleading statements and concealing material adverse facts regarding the Company’s financial condition, business operations and growth prospects. Plaintiffs seek unspecified damages on behalf of a purported class of investors who purchased the Company’s common stock from September 12, 2013 through April 9, 2015. On June 28, 2016, the Court appointed a lead plaintiff. On September 26, 2016, the lead plaintiff filed a consolidated complaint. On November 10, 2016, defendants filed a motion to dismiss, which the Court granted with leave to amend on April 27, 2017. On June 2, 2017, the lead plaintiff filed an amended complaint, which, on July 10, 2017, defendants again moved to dismiss. In a March 21, 2018 Order (the “March 2018 Order”), the Court granted in part and denied in part the defendants’ motion. The March 2018 Order narrowed the scope of the case, but allowed certain claims to proceed. The Company believes plaintiffs’ claims are without merit, and intends to defend them vigorously.

On February 18, 2016, a shareholder derivative case was filed in the Superior Court of California, Santa Clara County (Shaffer v. Kispert et al., No. 16 CV 291726). The complaint names current and former officers and directors as defendants, and seeks recovery on behalf of the Company based on substantially the same allegations as the securities class action litigation described above. As a result of the March 2018 Order, the stipulated stay of the derivative litigation now has ended.

XR Communications, LLC d/b/a Vivato Technologies, LLC v. Extreme Networks, Inc.

On April 19, 2017, XR Communications, LLC (“XR”) (d/b/a Vivato Technologies) filed a patent infringement lawsuit against the Company in the Central District of California (XR Communications, LLC, dba Vivato Technologies v. Extreme Networks, Inc., No. 2:17-cv-2953-AG). The operative Second Amended Complaint asserts infringement of U.S. Patent Nos. 7,062,296, 7,729,728, and 6,611,231 based on the Company’s manufacture, use, sale, offer for sale, and/or importation into the United States of certain access points and routers supporting multi-user, multiple-input, multiple-output technology. XR seeks unspecified damages, on-going royalties, pre- and post-judgment interest, and attorneys’ fees (but no injunction). On July 24, 2017, the Company filed its answer. In an order dated April 10, 2018, the Court stayed the case pending a resolution by the Patent Trial and Appeal Board of inter partes review petitions filed by several defendants in other XR-related patent lawsuits challenging the validity of the asserted patents. Given the stay, the Court took off calendar all previously scheduled events (including a Markman hearing and potential trial date), and scheduled a status conference on October 22, 2018. The Company believes the claims are without merit, and intends to defend them vigorously.

DIFF Scale Operation Research, LLC v. Extreme Networks, Inc.

On March 15, 2018, DIFF Scale Operation Research, LLC (“DIFF”) filed a patent infringement lawsuit against the Company in the United States District Court for the Southern District of New York (DIFF Scale Operation Research, LLC v. Extreme Networks, Inc., No. 18-cv-2324-KBF). The complaint alleges infringement of seven patents (four expired) generally directed to virtual connection networking, and accuses a variety of products, including: (1) SLX router and switch products, and NetIron and MLX products; (2) Extreme Management Center versions 7.0.9, 7.1.3, 8.0, and 8.1; (3) ExtremeSwitching and Summit Series switches; and (4) ERS 3000 Series, 4000 Series, and 5000 Series switches. DIFF seeks unspecified and enhanced damages, pre- and post-judgment interest, attorneys’ fees and costs (but no injunction). The Company believes the claims are without merit, and intends to defend them vigorously.

Be Labs, Inc. v. Extreme Networks, Inc.

On April 25, 2018, Be Labs, Inc. (“Be Labs”) filed a patent infringement lawsuit against the Company in the United States District Court for the District of Delaware (Be Labs, Inc. v. Extreme Networks, Inc., No. 1:18-cv-00626). The complaint alleges direct and indirect infringement of two patents generally directed to a multimedia wireless distribution system for home or office use, and appears to accuse the Company’s 802.11ac- and 802.11n-compliant ExtremeWireless products. Be Labs seeks damages, pre- and post-judgment interest, attorneys’ fees, costs, and a permanent injunction. The Company believes the claims are without merit, and intends to defend them vigorously.

Orckit IP, LLC v. Extreme Networks, Inc., Extreme Networks Ireland Ltd., and Extreme Networks GmbH

On February 1, 2018, Orckit IP, LLC (“Orckit”) filed a patent infringement lawsuit against the Company and our Irish and German subsidiaries in the District Court in Dusseldorf, Germany. The lawsuit alleges direct and indirect infringement of the German portion of European Patent EP 1 958 364 B1 based on the offer, distribution, use, possession and/or importation into Germany of certain network switches equipped with the ExtremeXOS operating system. Orckit is seeking injunctive relief, an accounting, and an unspecified declaration of liability for damages and costs of the lawsuit. On May 3, Extreme Networks GmbH filed a separate nullity action in the Federal Patent Court in Munich, seeking to invalidate the asserted patents, and on May 4, the defendants answered the complaint, denying any infringement and seeking a stay of the action pending the conclusion of the nullity action. The Company believes the claims are without merit, and intends to defend them vigorously.

Indemnification Obligations

Subject to certain limitations, the Company may be obligated to indemnify its current and former directors, officers and employees. These obligations arise under the terms of its certificate of incorporation, its bylaws, applicable contracts, and applicable law. The obligation to indemnify, where applicable, generally means that the Company is required to pay or reimburse, and in certain circumstances the Company has paid or reimbursed, the individuals' reasonable legal expenses and possibly damages and other liabilities incurred in connection with certain legal matters. For example, the Company currently is paying or reimbursing legal expenses being incurred by certain current and former officers and directors in connection with the shareholder litigation described above. The Company also procures Directors and Officers insurance to help cover its defense and/or indemnification costs, although its ability to recover such costs through insurance is uncertain. While it is not possible to estimate the maximum potential amount that could be owed under these indemnification agreements due to the Company’s limited history with prior indemnification claims, indemnification (including defense) costs could, in the future, have a material adverse effect on the Company’s consolidated financial position, results of operations and cash flows.

Income Taxes

9 Months Ended

Mar. 31, 2018

Income Tax Disclosure [Abstract]

Income Taxes

10.	Income Taxes

For the three months ended March 31, 2018 and 2017, the Company recorded income tax provision of $1.7 million and $1.2 million, respectively. For the nine months ended March 31, 2018 and 2017, the Company recorded income tax provision of $1.8 million and $3.3 million, respectively.

The income tax provisions for the three months ended March 31, 2018 and 2017, consisted primarily of taxes on the income of the Company’s foreign subsidiaries as well as tax expense associated with the establishment of a U.S. deferred tax liability for amortizable goodwill resulting from the acquisition of Enterasys Networks, Inc., the Zebra WLAN Business and the Campus Fabric Business. The income tax provisions for both fiscal years were calculated based on the actual results of operations for the three months ended March 31, 2018 and 2017, and therefore may not reflect the annual effective tax rate.

The income tax provisions for the nine months ended March 31, 2018 and 2017 consisted primarily of taxes on the income of the Company’s foreign subsidiaries as well as tax expense associated with the establishment of a U.S. deferred tax liability for amortizable goodwill resulting from the acquisitions referenced above. The income tax provision for the nine months ended March 31, 2018 is offset by a tax benefit of $2.5 million resulting from the reduction of the U.S. Federal tax rate from 35% to 21% applied to our deferred tax liability related to amortizable goodwill as required by the recently enacted U.S. tax legislation discussed below.

On December 22, 2017, the President of the United States signed and enacted into law H.R. 1, the Tax Cuts and Jobs Act (“TCJA”), which, except for certain provisions, is effective for tax years beginning on or after January 1, 2018. As a fiscal year taxpayer, the Company will not be subject to the majority of the tax law provisions until fiscal year 2019; however, there are certain significant items of impact that will be recognized in fiscal year 2018. Because a change in tax law is accounted for in the period of enactment, the effects of the TCJA, a tax benefit of $2.5 million, have been reflected in the second quarter of fiscal 2018.

The TCJA’s primary change is a reduction in the U.S. Federal statutory corporate tax rate from 35% to 21%, including a pro rata reduction from 35% to 28% for the Company in fiscal 2018. As a result, the Company has recognized a tax benefit in the amount of $2.5 million in the second quarter of fiscal 2018 due to the revaluation of the Company's deferred tax liability related to amortizable goodwill to reflect the lower statutory rate. Because the U.S. deferred tax assets are offset by a full valuation allowance, the reduction in deferred tax assets for the lower rate was fully offset by a corresponding reduction in valuation allowance resulting in no additional tax provision.

The TCJA moves the U.S. from a global taxation regime to a modified territorial regime. Under the territorial regime, the company’s foreign earnings will generally not be subject to tax in the US. As part of transitioning to this new regime, U.S. companies are required to pay tax on historical earnings generated offshore that have not been repatriated to the U.S. (“Transition Tax”). The Company has estimated as of the second quarter of fiscal 2018, there will be no incremental tax provision relating to the Transition Tax given the Company’s ability to utilize existing tax attributes to offset the impact of the deemed repatriation.

The TCJA makes broad and complex changes to the U.S. tax code, and in certain instances, lacks clarity and is subject to interpretation until additional U.S. Treasury guidance is issued. On December 22, 2017, the SEC issued guidance under Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act (“SAB 118”), which allows registrants to record provisional amounts during a one year “measurement period” similar to that used when accounting for business combinations. However, the measurement period is deemed to have ended earlier when the registrant has obtained, prepared and analyzed the information necessary to finalize its accounting. During the measurement period, impacts of the law are expected to be recorded at the time a reasonable estimate for all or a portion of the effects can be made, and provisional amounts can be recognized and adjusted as information becomes available, prepared or analyzed. The SAB summarizes a three-step process to be applied at each reporting period to account for and qualitatively disclose: (1) the effects of the change in tax law for which accounting is complete; (2) provisional amounts (or adjustments to provisional amounts) for the effects of the tax law where accounting is not complete, but that a reasonable estimate has been determined; and (3) a reasonable estimate cannot yet be made and therefore taxes are reflected in accordance with law prior to the enactment of the TCJA.

Amounts recorded where accounting is complete in the nine months ended March 31, 2018 principally relate to the reduction in the U.S. federal tax rate to 21 percent, which resulted in the Company reporting an income tax benefit of $2.5 million to remeasure deferred tax liabilities associated with indefinitely lived intangible assets that will reverse at the new 21% rate. Absent this deferred tax liability, the Company is in a net deferred tax asset position that is offset by a full valuation allowance. Though the impact of the rate change related to net deferred tax assets has a net tax effect of zero, the accounting to determine the gross change in the deferred tax position and the offsetting valuation is not yet complete. In accordance with Staff Accounting Bulletin (“SAB”) 118, the estimated income tax impact associated with the Transition Tax of zero represents our best estimate based on interpretation of the U.S. legislation as we are still accumulating data to finalize the underlying calculation. In accordance with SAB 118, estimated income tax impact associated with the Transition Tax is considered provisional and will be finalized prior to the end of the measurement period. The ultimate impact may differ from these provisional amounts, due to, among other things, additional analysis, changes in interpretations and assumptions the Company has made, additional regulatory guidance that may be issued, and actions the Company may take as a result of the TCJA.

With respect to provisions of the TCJA effective for tax years beginning on or after January 1, 2018, the company anticipates several new provisions may potentially impact tax provisions in future periods including limitations on the deductibility of interest expense and certain executive compensation, a minimum tax on certain foreign earnings (i.e., global intangible low-taxed income or “GILTI”), as well as a base-erosion and anti-abuse tax (“BEAT”). The GILTI provisions require the Company to include in its U.S. income tax return foreign subsidiary earnings in excess of an allowable return on the foreign subsidiary’s tangible assets. Based on initial assessment and interpretation of the new provision, the Company expects that it will be subject to incremental U.S. tax on GILTI income beginning in fiscal 2019. The Company may elect to account for GILTI tax as a component of tax expense in the period in which it is incurred or account for the GILTI tax in the measurement of deferred taxes. The Company is continuing to evaluate this particular provision and therefore has not yet elected a method but will do so once our analysis is complete. The BEAT provisions in the Tax Reform Act eliminate the deduction of certain base-erosion payments made to related foreign corporations, and impose a minimum tax if greater than regular tax. There is a reasonable amount of uncertainty surrounding the interpretation of this new provision, however, based on initial assessment and a conservative interpretation of the new provision, the Company expects that it will be subject to the incremental U.S. tax on BEAT income beginning in fiscal 2019.

The Company has provided a full valuation allowance against all of its U.S. federal and state deferred tax assets as well as the deferred tax assets in Australia and Brazil. A valuation allowance is determined by assessing both negative and positive evidence to determine whether it is “more likely than not” that the deferred tax assets are recoverable; such assessment is required on a jurisdiction by jurisdiction basis. The Company's inconsistent earnings in recent periods, including a cumulative loss over the last three years, coupled with its difficulty in forecasting future revenue trends as well as the cyclical nature of its business represent sufficient negative evidence to require a full valuation allowance against its U.S. federal and state net deferred tax assets as well as the above mentioned foreign jurisdictions. This valuation allowance will be evaluated periodically and can be reversed partially or in whole if business results and the economic environment have sufficiently improved to support realization of some or all of the Company's deferred tax assets.

The acquisition of Enterasys in October 2013 included a U.S. parent company as well as its wholly-owned domestic and foreign subsidiaries. The Company elected to treat this stock acquisition as an asset purchase by filing the required election forms under IRC Sec 338(h)(10). Additionally, the Company completed asset purchases of the Zebra WLAN Business, the Campus Fabric Business and the Brocade Data Center Business in October 2016, July 2017 and October 2017, respectively. The Company has estimated the value of the intangible assets from these transactions and is amortizing the amounts over 15 years for tax purposes. During the three and nine months ended March 31, 2018, the Company deducted $1.8 million and $5.5 million of tax amortization expense respectively, for each period related to capitalized goodwill resulting from these acquisitions. As of March 31, 2018, the Company recorded a deferred tax liability of $5.3 million related to this goodwill amortization which is not considered a future source of taxable income in evaluating the need for a valuation allowance against its deferred tax assets.

The Company had $18.5 million of unrecognized tax benefits as of March 31, 2018. The future impact of the unrecognized tax benefit of $18.5 million, if recognized, would result in adjustments to deferred tax assets and corresponding adjustments to the valuation allowance. The Company does not anticipate any events to occur during the next twelve months that would reduce the unrealized tax benefit as currently stated in the Company’s balance sheet.

The Company’s policy is to accrue interest and penalties related to the underpayment of income taxes as a component of tax expense in the accompanying condensed consolidated statements of operations.

In general, the Company’s U.S. federal income tax returns are subject to examination by tax authorities for fiscal years 2001 forward due to net operating losses and the Company's state income tax returns are subject to examination for fiscal years 2000 forward due to net operating losses. The Company is currently under examination by the state of North Carolina for the fiscal years ended 2014, 2015 and 2016.

Net Loss Per Share

9 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Net Loss Per Share

11.	Net Loss Per Share

Basic earnings per share is calculated by dividing net earnings by the weighted average number of common shares outstanding during the period. Dilutive earnings per share is calculated by dividing net earnings by the weighted average number of common shares used in the basic earnings per share calculation plus the dilutive effect of shares subject to repurchase, options, warrants and unvested restricted stock units.

The following table presents the calculation of net loss per share of basic and diluted (in thousands, except per share data):

	Three Months Ended						Nine Months Ended
	March 31, 2018			March 31, 2017			March 31, 2018			March 31, 2017
				(As adjusted)						(As adjusted)
Net loss	$	(13,613	)	$	(4,977	)	$	(41,160	)	$	(14,948	)
Weighted-average shares used in per share calculation - basic and diluted		115,059			109,213			113,641			107,531
Net loss per share - basic and diluted	$	(0.12	)	$	(0.05	)	$	(0.36	)	$	(0.14	)

The following securities were excluded from the computation of net loss per diluted share of common stock for the periods presented as their effect would have been anti-dilutive (in thousands):

	Three Months Ended				Nine Months Ended
	March 31, 2018		March 31, 2017		March 31, 2018		March 31, 2017
Options to purchase common stock		2,379		—		2,649		398
Restricted stock units		8,213		4		7,670		7
Employee Stock Purchase Plan shares		972		269		1,101		269
Total shares excluded		11,564		273		11,420		674

Foreign Exchange Forward Contracts

9 Months Ended

Mar. 31, 2018

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Foreign Exchange Forward Contracts

12.	Foreign Exchange Forward Contracts

The Company uses derivative financial instruments to manage exposures to foreign currency. The Company’s objective for holding derivatives is to use the most effective methods to minimize the impact of these exposures. The Company does not enter into derivatives for speculative or trading purposes. The fair value of the Company’s derivatives in a gain position are recorded in “Prepaid expenses and other current assets” and derivatives in a loss position are recorded in “Other accrued liabilities” in the accompanying condensed consolidated balance sheets. Changes in the fair value of derivatives are recorded in “Other income (expense), net” in the accompanying condensed consolidated statements of operations. The Company enters into foreign exchange forward contracts to mitigate the effect of gains and losses generated by foreign currency transactions related to certain operating expenses and re-measurement of certain assets and liabilities denominated in foreign currencies. These derivatives do not qualify as hedges.

As of March 31, 2018, forward foreign currency contracts had a notional principal amount of $6.7 million and an immaterial unrealized gain. These contracts have maturities of less than 90 days. Changes in the fair value of these foreign exchange forward contracts are offset largely by re-measurement of the underlying assets and liabilities. As of March 31, 2017, the Company did not have any derivative instruments outstanding.

Foreign currency transactions gains and losses from operations was a loss of $0.3 million and a gain of $0.8 million for the three months ended March 31, 2018 and 2017, respectively. Foreign currency transactions gains and losses from operations was a loss of $1.5 million and a gain of less than $0.1 million for the nine months ended March 31, 2018 and 2017, respectively.

Disclosure about Segments of an Enterprise and Geographic Areas

9 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Disclosure about Segments of an Enterprise and Geographic Areas

13.	Disclosure about Segments of an Enterprise and Geographic Areas

The Company operates in one segment, the development and marketing of network infrastructure equipment. The Company conducts business globally and is managed geographically. Revenue is attributed to a geographical area based on the location of its customers. The Company operates in three geographical areas: Americas, which includes the United States, Canada, Mexico, Central America and South America; EMEA, which includes Europe, Russia, Middle East and Africa; and APAC which includes Asia Pacific, South Asia, India, Australia and Japan.

The Company attributes revenues to geographic regions and channels based on the customer's ship-to location as follows (in thousands):

	Three Months Ended
	March 31, 2018						March 31, 2017
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	76,392	$	56,929	$	133,321	$	31,972	$	47,367	$	79,339
Other		4,288		6,165		10,453		1,559		1,901		3,460
Total Americas		80,680		63,094		143,774		33,531		49,268		82,799
EMEA:		58,668		36,120		94,788		32,090		20,136		52,226
APAC:		3,085		20,357		23,442		2,399		11,772		14,171
Total net revenues	$	142,433	$	119,571	$	262,004	$	68,020	$	81,176	$	149,196

	Nine Months Ended
	March 31, 2018						March 31, 2017
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	181,415	$	160,484	$	341,899	$	98,026	$	112,592	$	210,618
Other		13,417		20,252		33,669		5,779		14,772		20,551
Total Americas		194,832		180,736		375,568		103,805		127,364		231,169
EMEA:		165,856		97,647		263,503		99,459		61,026		160,485
APAC:		11,480		54,291		65,771		5,464		31,059		36,523
Total net revenues	$	372,168	$	332,674	$	704,842	$	208,728	$	219,449	$	428,177

The Company’s long-lived assets are attributed to the geographic regions as follows (in thousands):

Long-lived Assets	March 31, 2018		June 30, 2017
			(As adjusted)
Americas	$	189,321	$	67,369
EMEA		15,586		8,998
APAC		10,334		4,275
Total long-lived assets	$	215,241	$	80,642

Subsequent Event	9 Months Ended
Subsequent Event	Mar. 31, 2018
Subsequent Events [Abstract]
Subsequent Event	14.Subsequent Event On May 1, 2018, the Company terminated the Amended and Restated Credit Agreement dated October 28, 2016, by and among the Company, as borrower, Silicon Valley Bank, as administrative agent, and the financial institutions that were a party thereto as lenders. On May 1, 2018, the Company entered into a Credit Agreement (the “New Credit Agreement”), by and among the Company, as borrower, BMO Harris Bank N.A., as an issuing lender and swingline lender, Bank of Montreal, as administrative and collateral agent, and the financial institutions or entities that are a party thereto as lenders. The New Credit Agreement provides for a $40 million five-year revolving credit facility (the “New Revolver”) and a $190 million five-year term loan (the “New Term Loan” and together with the New Revolver, the “New Senior Secured Credit Facilities”). On May 1, 2018, the Company borrowed $200 million under the New Senior Secured Credit Facilities in order to pay off the existing debt, as noted above and for general corporate purposes. Borrowings under the New Senior Secured Credit Facilities will bear interest, at the Company’s election, as of May 1, 2018, at a rate per annum equal to LIBOR plus 1.50% to 2.75%, or the adjusted base rate plus 0.50% to 1.75%, based on the Company’s Consolidated Leverage Ratio. In addition, the Company is required to pay a commitment fee of between 0.25% and 0.40% quarterly (currently 0.35%) on the unused portion of the New Revolver, also based on the Company’s Consolidated Leverage Ratio. Principal installments are payable on the New Term Loan in varying percentages quarterly starting June 30, 2018 and to the extent not previously paid, all outstanding balances are to be paid at maturity. The New Senior Secured Credit Facilities are secured by substantially all of the Company’s assets. Financial covenants under the New Credit Agreement require the Company to maintain a minimum consolidated fixed charge coverage ratio of at least 1.25:1.00 at the end of each fiscal quarter. In addition, the Company’s Consolidated Leverage Ratio shall not be greater than (i) 3.00:1.00 at the end of the fiscal quarters ending March 31, 2018 through September 30, 2019, (ii) 2.75:1.00 at the end of the fiscal quarters ending December 31, 2019 through March 31, 2021, and (iii) 2.50:1.00 at the end of the fiscal quarters ending June 30, 2021 and thereafter. The New Credit Agreement also includes covenants and restrictions that limit, among other things, the Company’s ability to incur additional indebtedness, create liens upon any of its property, merge, consolidate or sell all or substantially all of its assets. The New Credit Agreement also includes customary events of default, including failure to pay principal, interest or fees when due, failure to comply with covenants, the material breach of any of representations and warranties, certain insolvency or receivership events affecting the Company and its subsidiaries, the occurrence of certain material judgments, the occurrence of certain ERISA events, the invalidity of the loan documents or a change in control of the Company. The amounts outstanding under the New Senior Secured Credit Facilities may be accelerated upon certain events of default.

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Fiscal Year

Principles of Consolidation

The consolidated financial statements include the accounts of Extreme and its wholly-owned subsidiaries. All inter-company accounts and transactions have been eliminated.

Accounting Estimates

Revenue Recognition

Revenue by Category: The following table sets forth the Company’s revenue disaggregated by sales channel and geographic region based on the customer’s ship-to locations (in thousands, unaudited):

	Three Months Ended
	March 31, 2018						March 31, 2017
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	76,392	$	56,929	$	133,321	$	31,972	$	47,367	$	79,339
Other		4,288		6,165		10,453		1,559		1,901		3,460
Total Americas		80,680		63,094		143,774		33,531		49,268		82,799
EMEA:		58,668		36,120		94,788		32,090		20,136		52,226
APAC:		3,085		20,357		23,442		2,399		11,772		14,171
Total net revenues	$	142,433	$	119,571	$	262,004	$	68,020	$	81,176	$	149,196

	Nine Months Ended
	March 31, 2018						March 31, 2017
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	181,415	$	160,484	$	341,899	$	98,026	$	112,592	$	210,618
Other		13,417		20,252		33,669		5,779		14,772		20,551
Total Americas		194,832		180,736		375,568		103,805		127,364		231,169
EMEA:		165,856		97,647		263,503		99,459		61,026		160,485
APAC:		11,480		54,291		65,771		5,464		31,059		36,523
Total net revenues	$	372,168	$	332,674	$	704,842	$	208,728	$	219,449	$	428,177

Business Combinations

Cash, Cash Equivalents and Marketable Securities

The following is a summary of cash, cash equivalents and marketable securities (in thousands):

	March 31, 2018		June 30, 2017
Cash	$	98,677	$	126,159
Cash equivalents		4,500		4,291
Total cash and cash equivalents		103,177		130,450
Marketable securities (consisting of available-for-sale securities)		2,091		—
Total cash, cash equivalents and marketable securities	$	105,268	$	130,450

Inventories

Inventories consist of the following (in thousands):

	March 31, 2018		June 30, 2017
			(As Adjusted)
Finished goods	$	63,306	$	46,620
Raw materials		14,450		790
Total Inventories	$	77,756	$	47,410

Property and Equipment, Net

Property and equipment consist of the following (in thousands):

	March 31, 2018			June 30, 2017
Computers and equipment	$	69,712		$	34,716
Purchased software		16,908			11,785
Office equipment, furniture and fixtures		18,143			10,852
Leasehold improvements		47,039			23,046
Total property and equipment		151,802			80,399
Less: accumulated depreciation and amortization		(65,315	)		(50,159	)
Property and equipment, net	$	86,487		$	30,240

Intangibles

The following tables summarize the components of gross and net intangible asset balances (dollars in thousands)

	Weighted Average
	Remaining Amortization	Gross Carrying		Accumulated		Net Carrying
	Period	Amount		Amortization		Amount
March 31, 2018
Developed technology	3.8 years	$	117,500	$	52,860	$	64,640
Customer relationships	3.7 years		51,639		39,577		12,062
Maintenance contracts	0.6 years		17,000		15,016		1,984
Trade names	3.7 years		9,100		3,776		5,324
Backlogs	— years		1,800		1,800		—
License agreements	5.9 years		2,445		1,323		1,122
Other intangibles	1.9 years		1,382		1,108		274
Total intangibles, net		$	200,866	$	115,460	$	85,406

	Weighted Average
	Remaining Amortization	Gross Carrying		Accumulated		Net Carrying
	Period	Amount		Amortization		Amount
June 30, 2017
Developed technology	5.3 years	$	55,400	$	42,689	$	12,711
Customer relationships	3.3 years		40,300		37,567		2,733
Maintenance contracts	1.3 years		17,000		12,467		4,533
Trade names	4.3 years		5,100		2,846		2,254
License agreements	6.4 years		2,445		1,120		1,325
Other intangibles	2.7 years		1,382		1,001		381
Total intangibles, net with finite lives			121,627		97,690		23,937
In-process research and development, with indefinite life			1,400		—		1,400
Total intangibles, net		$	123,027	$	97,690	$	25,337

The amortization expense of intangibles for the periods presented is summarized below (in thousands):

	Three Months Ended				Nine Months Ended
	March 31, 2018		March 31, 2017		March 31, 2018		March 31, 2017
Amortization in “Cost of revenues: Product”	$	4,647	$	995	$	11,310	$	6,271
Amortization of intangibles		2,101		1,193		6,461		7,510
Total amortization	$	6,748	$	2,188	$	17,771	$	13,781

The amortization expense that is recognized in “Cost of revenues: Product” is comprised of amortization for developed technology, license agreements and other intangibles.

Goodwill

The following table summarizes goodwill for the periods presented (in thousands):

	March 31, 2018
Balance as of June 30, 2017	$	80,216
Additions due to acquisitions		49,028
Balance at end of period	$	129,244

Deferred Revenue

The Company offers for sale to its customers, renewable support arrangements that range from one to five years as well as professional and training services, which results in deferred revenue.

Debt

The Company’s debt is comprised of the following (in thousands):

	March 31, 2018			June 30, 2017
Current portion of long-term debt:
Term Loan	$	25,260		$	12,444
Less: unamortized debt issuance costs		(540	)		(164	)
Current portion of long-term debt	$	24,720		$	12,280

Long-term debt, less current portion:
Term Loan	$	145,173		$	71,268
Revolver		10,000			10,000
Less: unamortized debt issuance costs		(1,215	)		(846	)
Total long-term debt, less current portion		153,958			80,422
Total debt	$	178,678		$	92,702

The Company had $1.2 million of outstanding letters of credit and $48.8 million of availability under the Revolver as of March 31, 2018.

On May 1, 2018, the Company terminated the Credit Facility.

See Note 14 (Subsequent Events) to the condensed consolidated financial statements for more information on the New Credit Agreement.

Guarantees and Product Warranties

	Three Months Ended						Nine Months Ended
	March 31, 2018			March 31, 2017			March 31, 2018			March 31, 2017
				(As adjusted)						(As adjusted)
Balance beginning of period	$	13,010		$	10,790		$	10,584		$	9,998
Warranties assumed due to acquisitions		—			—			3,682			2,034
New warranties issued		2,872			1,893			6,801			3,997
Warranty expenditures		(3,070	)		(2,080	)		(8,255	)		(5,426	)
Balance end of period	$	12,812		$	10,603		$	12,812		$	10,603

Other Long-term Liabilities

Other long-term liabilities

The following is a summary of long-term liabilities (in thousands):

	March 31, 2018		June 30, 2017
Acquisition related deferred payments, less current portion	$	14,147	$	—
Acquisition-related contingent consideration obligations, less current portion		33,256		—
Other		18,037		8,526
Total other long-term liabilities	$	65,440	$	8,526

Advertising

All advertising costs are expensed as incurred. Advertising expenses for three and nine months ended March 31, 2018 and 2017, were immaterial.

Concentrations

The Company performs ongoing credit evaluations of its customers and generally does not require collateral in exchange for credit.

The following table sets forth major customers accounting for 10% or more of our net revenues:

	Three Months Ended		Nine Months Ended
	March 31, 2018	March 31, 2017	March 31, 2018	March 31, 2017
		(As adjusted)		(As adjusted)
Westcon Group Inc.	14%	10%	14%	11%
Tech Data Corporation	14%	13%	13%	15%
Jenne Corporation	13%	14%	11%	14%

The following customers account for more than 10% of the Company’s accounts receivable outstanding as of March 31, 2018, Tech Data 18% and Westcon Group 14%

Earnings Per Share

Dilutive earnings per share is calculated by dividing net earnings by the weighted average number of common shares used in the basic earnings per share calculation plus the dilutive effect of shares subject to repurchase, options, warrants and unvested restricted stock units.

Business Combinations (Tables)

9 Months Ended

Mar. 31, 2018

Summary of Unaudited Pro Forma Financial Information

The following table summarizes the unaudited pro forma financial information (in thousands, except per share amounts):

	Three Months Ended						Nine Months Ended
	March 31, 2018			March 31, 2017			March 31, 2018			March 31, 2017
				(As adjusted)						(As adjusted)
Net revenues	$	262,004		$	267,176		$	799,044		$	911,611
Net loss	$	(13,613	)	$	(40,235	)	$	(21,235	)	$	(136,207	)
Net loss per share - basic	$	(0.12	)	$	(0.37	)	$	(0.19	)	$	(1.27	)
Net loss per share - diluted	$	(0.12	)	$	(0.37	)	$	(0.19	)	$	(1.27	)
Shares used in per share calculation - basic		115,059			109,213			113,641			107,531
Shares used in per share calculation - diluted		115,059			109,213			113,641			107,531

Data Center Business

Components of Aggregate Estimated Purchase Consideration

The components of aggregate estimated purchase consideration are as follows (in thousands):

Estimated purchase consideration	October 27, 2017
Cash paid to sellers at closing	$	23,000
Deferred payments		18,430
Contingent consideration		34,100
Working capital adjustment		6,534
Replacement of stock-based awards		2,273
Aggregate estimated purchase consideration	$	84,337

Summary of Allocation of Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed

The following table below summarizes the preliminary allocation as of March 31, 2018 of the tangible and identifiable intangible assets acquired and liabilities assumed (in thousands):

	Preliminary Allocation as of December 31, 2017			Change during three months ended March 31, 2018				Preliminary Allocation as of March 31, 2018
Accounts receivables	$	33,488		$	—			$	33,488
Inventories		19,973			(39	)	(a)		19,934
Prepaid expenses and other current assets		988			—				988
Property and equipment		29,160			—				29,160
Other assets		4,734			—				4,734
Accounts payable and accrued expenses		(15,850	)		113		(b)		(15,737	)
Deferred revenue		(33,519	)		494		(c)		(33,025	)
Net tangible assets acquired		38,974			568				39,542
Identifiable intangible assets		28,600			3,600		(d)		32,200
Goodwill		16,763			(4,168	)			12,595
Total intangible assets acquired		45,363			(568	)			44,795
Total net assets acquired	$	84,337		$	—			$	84,337

Schedule of Identifiable Intangible Assets Acquired as Part of Acquisition

The following table presents details of the identifiable intangible assets acquired as part of the acquisition (dollars in thousands):

Intangible Assets	Estimated Useful Life (in years)		Amount
Developed technology	2 - 5		$	25,400
Customer relationships		5		5,400
Trade names		4		1,400
Total identifiable intangible assets			$	32,200

Campus Fabric Business

Summary of Allocation of Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed

The following table below summarizes the preliminary allocation as of March 31, 2018 of the tangible and identifiable intangible assets acquired and liabilities assumed (in thousands):

	Preliminary Allocation as of December 31, 2017			Change during three months ended March 31, 2018				Preliminary Allocation as of March 31, 2018
Accounts receivables	$	18,295		$	417		(a)	$	18,712
Inventories		15,545			—				15,545
Prepaid expenses and other current assets		673			(24	)	(b)		649
Property and equipment		3,768			1,638		(c)		5,406
Other assets		5,311			(517	)	(d)		4,794
Accounts payable and accrued expenses		(31,919	)		(395	)	(c)		(32,314	)
Deferred revenue		(10,051	)		1,057		(e)		(8,994	)
Other long-term liabilities		(5,205	)		—				(5,205	)
Net tangible assets acquired		(3,583	)		2,176				(1,407	)
Identifiable intangible assets		46,900			(4,700	)	(f)		42,200
In-process research and development		2,500			100		(f)		2,600
Goodwill		34,009			2,424				36,433
Total intangible assets acquired		83,409			(2,176	)			81,233
Total net assets acquired	$	79,826		$	—			$	79,826

Schedule of Identifiable Intangible Assets Acquired as Part of Acquisition

The following table presents details of the identifiable intangible assets acquired as part of the acquisition (dollars in thousands):

Intangible Assets	Estimated Useful Life (in years)		Amount
Developed technology	2 - 4		$	32,700
Customer relationships		4		5,100
Trade names	4 - 5			2,600
Backlog		1		1,800
Total identifiable intangible assets			$	42,200

Zebra Technologies Corporation

Summary of Allocation of Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed

	Final Allocation as of October 28, 2016
Accounts receivables, net	$	14,636
Inventories		13,593
Other current assets		808
Property and equipment		3,159
Other assets		7,634
Deferred revenue		(14,159	)
Other liabilities		(7,201	)
Total tangible assets acquired and liabilities assumed		18,470
Identifiable intangible assets		20,300
In-process research and development		1,400
Goodwill		9,339
Total intangible assets acquired		31,039
Total net assets acquired	$	49,509

Summary of Significant Accounting Policies (Tables)

9 Months Ended

Mar. 31, 2018

Accounting Policies [Abstract]

Schedule of Revenue by Sales Channel and Geographic Region

The following table sets forth the Company’s revenue disaggregated by sales channel and geographic region based on the customer’s ship-to locations (in thousands, unaudited):

	Three Months Ended
	March 31, 2018						March 31, 2017
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	76,392	$	56,929	$	133,321	$	31,972	$	47,367	$	79,339
Other		4,288		6,165		10,453		1,559		1,901		3,460
Total Americas		80,680		63,094		143,774		33,531		49,268		82,799
EMEA:		58,668		36,120		94,788		32,090		20,136		52,226
APAC:		3,085		20,357		23,442		2,399		11,772		14,171
Total net revenues	$	142,433	$	119,571	$	262,004	$	68,020	$	81,176	$	149,196

	Nine Months Ended
	March 31, 2018						March 31, 2017
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	181,415	$	160,484	$	341,899	$	98,026	$	112,592	$	210,618
Other		13,417		20,252		33,669		5,779		14,772		20,551
Total Americas		194,832		180,736		375,568		103,805		127,364		231,169
EMEA:		165,856		97,647		263,503		99,459		61,026		160,485
APAC:		11,480		54,291		65,771		5,464		31,059		36,523
Total net revenues	$	372,168	$	332,674	$	704,842	$	208,728	$	219,449	$	428,177

Recent Accounting Pronouncements (Tables)

9 Months Ended

Mar. 31, 2018

Accounting Changes And Error Corrections [Abstract]

Schedule of Adjustments to Previously Reported Financial Statements from Adoption of Accounting Pronouncements

The following table presents the effect of the adoption of Topic 606 on our condensed consolidated balance sheet (unaudited) as of June 30, 2017, (in thousands):

	As of June 30, 2017
	As Reported			Adjustment			As Adjusted
Accounts receivable, net	$	120,770		$	(27,655	)	$	93,115
Inventories		45,880			1,530			47,410
Total current assets		324,967			(26,125	)		298,842
Other assets		22,586			2,479			25,065
Total assets		483,346			(23,646	)		459,700

Accrued warranty		10,007			577			10,584
Other accrued liabilities		36,713			331			37,044
Deferred distributors revenue, net of cost of sales to distributors		43,525			(43,525	)		—
Total current liabilities		255,822			(42,617	)		213,205

Accumulated deficit		(800,257	)		18,971			(781,286	)
Total stockholders’ equity		106,707			18,971			125,678
Total liabilities and stockholders’ equity	$	483,346		$	(23,646	)	$	459,700

	Three Months Ended March 31, 2017
	As Reported			Adjustment			As Adjusted
Net revenues
Product	$	110,789		$	532		$	111,321
Service		37,875			—			37,875
Total net revenues		148,664			532			149,196

Cost of revenues
Product		52,401			(126	)		52,275
Service		14,117			—			14,117
Total cost of revenues		66,518			(126	)		66,392

Gross profit
Product		58,388			658			59,046
Service		23,758			—			23,758
Total Gross profit		82,146			658			82,804

Sales and marketing expenses		38,759			31			38,790
Operating loss		(3,246	)		627			(2,619	)
Net loss before tax		(4,438	)		627			(3,811	)
Net loss	$	(5,604	)	$	627		$	(4,977	)

Basic and diluted net loss per share
Net loss per share - basic	$	(0.05	)				$	(0.05	)
Net loss per share - diluted	$	(0.05	)				$	(0.05	)

Shares used in per share calculation - basic		109,213						109,213
Shares used in per share calculation - diluted		109,213						109,213

	Nine Months Ended March 31, 2017
	As Reported			Adjustment			As Adjusted
Net revenues
Product	$	310,709		$	8,760		$	319,469
Service		108,708			—			108,708
Total net revenues		419,417			8,760			428,177

Cost of revenues
Product		155,987			3,164			159,151
Service		40,684			—			40,684
Total cost of revenues		196,671			3,164			199,835

Gross profit
Product		154,722			5,596			160,318
Service		68,024			—			68,024
Total Gross profit		222,746			5,596			228,342

Sales and marketing expenses		116,824			(150	)		116,674
Operating loss		(15,367	)		5,746			(9,621	)
Net loss before tax		(17,442	)		5,746			(11,696	)
Net loss	$	(20,694	)	$	5,746		$	(14,948	)

Basic and diluted net loss per share
Net loss per share - basic	$	(0.19	)				$	(0.14	)
Net loss per share - diluted	$	(0.19	)				$	(0.14	)

Shares used in per share calculation - basic		107,531						107,531
Shares used in per share calculation - diluted		107,531						107,531

The following tables present the effect of the adoption of Topic 606 on our condensed consolidated statement of cash flows (unaudited) for the nine months ended March 31, 2017 (in thousands):

	Nine Months Ended March 31, 2017
	As Reported			Adjustment			As Adjusted
Cash flows from operating activities
Net loss	$	(20,694	)	$	5,746		$	(14,948	)
Changes in operating assets and liabilities, net
Accounts receivable		(5,926	)		13,158			7,232
Inventories		6,344			(1,620	)		4,724
Prepaid expenses and other assets		8,181			(150	)		8,031
Deferred distributors revenue, net of cost of sales to distributors		17,441			(17,441	)		—
Other current and long-term liabilities		5,887			307			6,194
Net cash provided by operating activities		43,961			—			43,961
Cash flows from investing activities		(69,159	)		—			(69,159	)
Cash flows from financing activities		48,328			—			48,328
Foreign currency effect on cash		28			—			28
Net increase in cash and cash equivalents	$	23,158		$	—		$	23,158

Balance Sheet Accounts (Tables)

9 Months Ended

Mar. 31, 2018

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Summary of Cash, Cash Equivalents and Marketable Securities

The following is a summary of cash, cash equivalents and marketable securities (in thousands):

	March 31, 2018		June 30, 2017
Cash	$	98,677	$	126,159
Cash equivalents		4,500		4,291
Total cash and cash equivalents		103,177		130,450
Marketable securities (consisting of available-for-sale securities)		2,091		—
Total cash, cash equivalents and marketable securities	$	105,268	$	130,450

Components of Inventories

Inventories consist of the following (in thousands):

	March 31, 2018		June 30, 2017
			(As Adjusted)
Finished goods	$	63,306	$	46,620
Raw materials		14,450		790
Total Inventories	$	77,756	$	47,410

Components of Property and Equipment

Property and equipment consist of the following (in thousands):

	March 31, 2018			June 30, 2017
Computers and equipment	$	69,712		$	34,716
Purchased software		16,908			11,785
Office equipment, furniture and fixtures		18,143			10,852
Leasehold improvements		47,039			23,046
Total property and equipment		151,802			80,399
Less: accumulated depreciation and amortization		(65,315	)		(50,159	)
Property and equipment, net	$	86,487		$	30,240

Components of Gross and Net Intangible Asset Balances

The following tables summarize the components of gross and net intangible asset balances (dollars in thousands)

	Weighted Average
	Remaining Amortization	Gross Carrying		Accumulated		Net Carrying
	Period	Amount		Amortization		Amount
March 31, 2018
Developed technology	3.8 years	$	117,500	$	52,860	$	64,640
Customer relationships	3.7 years		51,639		39,577		12,062
Maintenance contracts	0.6 years		17,000		15,016		1,984
Trade names	3.7 years		9,100		3,776		5,324
Backlogs	— years		1,800		1,800		—
License agreements	5.9 years		2,445		1,323		1,122
Other intangibles	1.9 years		1,382		1,108		274
Total intangibles, net		$	200,866	$	115,460	$	85,406

	Weighted Average
	Remaining Amortization	Gross Carrying		Accumulated		Net Carrying
	Period	Amount		Amortization		Amount
June 30, 2017
Developed technology	5.3 years	$	55,400	$	42,689	$	12,711
Customer relationships	3.3 years		40,300		37,567		2,733
Maintenance contracts	1.3 years		17,000		12,467		4,533
Trade names	4.3 years		5,100		2,846		2,254
License agreements	6.4 years		2,445		1,120		1,325
Other intangibles	2.7 years		1,382		1,001		381
Total intangibles, net with finite lives			121,627		97,690		23,937
In-process research and development, with indefinite life			1,400		—		1,400
Total intangibles, net		$	123,027	$	97,690	$	25,337

Summary of Amortization Expense of Intangibles

The amortization expense of intangibles for the periods presented is summarized below (in thousands):

	Three Months Ended				Nine Months Ended
	March 31, 2018		March 31, 2017		March 31, 2018		March 31, 2017
Amortization in “Cost of revenues: Product”	$	4,647	$	995	$	11,310	$	6,271
Amortization of intangibles		2,101		1,193		6,461		7,510
Total amortization	$	6,748	$	2,188	$	17,771	$	13,781

Summary of Goodwill

The following table summarizes goodwill for the periods presented (in thousands):

	March 31, 2018
Balance as of June 30, 2017	$	80,216
Additions due to acquisitions		49,028
Balance at end of period	$	129,244

Components of Debt

The Company’s debt is comprised of the following (in thousands):

	March 31, 2018			June 30, 2017
Current portion of long-term debt:
Term Loan	$	25,260		$	12,444
Less: unamortized debt issuance costs		(540	)		(164	)
Current portion of long-term debt	$	24,720		$	12,280

Long-term debt, less current portion:
Term Loan	$	145,173		$	71,268
Revolver		10,000			10,000
Less: unamortized debt issuance costs		(1,215	)		(846	)
Total long-term debt, less current portion		153,958			80,422
Total debt	$	178,678		$	92,702

Summary of Product Warranty Liability Activity

The following table summarizes the activity related to the Company’s product warranty liability during the three and nine months ended March 31, 2018 and 2017 (in thousands):

	Three Months Ended						Nine Months Ended
	March 31, 2018			March 31, 2017			March 31, 2018			March 31, 2017
				(As adjusted)						(As adjusted)
Balance beginning of period	$	13,010		$	10,790		$	10,584		$	9,998
Warranties assumed due to acquisitions		—			—			3,682			2,034
New warranties issued		2,872			1,893			6,801			3,997
Warranty expenditures		(3,070	)		(2,080	)		(8,255	)		(5,426	)
Balance end of period	$	12,812		$	10,603		$	12,812		$	10,603

Summary of Long-term Liabilities

The following is a summary of long-term liabilities (in thousands):

	March 31, 2018		June 30, 2017
Acquisition related deferred payments, less current portion	$	14,147	$	—
Acquisition-related contingent consideration obligations, less current portion		33,256		—
Other		18,037		8,526
Total other long-term liabilities	$	65,440	$	8,526

Schedule of Major Customers Accounting for 10% or More of Net Revenues

The following table sets forth major customers accounting for 10% or more of our net revenues:

	Three Months Ended		Nine Months Ended
	March 31, 2018	March 31, 2017	March 31, 2018	March 31, 2017
		(As adjusted)		(As adjusted)
Westcon Group Inc.	14%	10%	14%	11%
Tech Data Corporation	14%	13%	13%	15%
Jenne Corporation	13%	14%	11%	14%

Fair Value Measurements (Tables)

9 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of Fair Value for Financial Assets and Liabilities Measured on Recurring Basis

The following table presents the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis (in thousands):

March 31, 2018	Level 1		Level 2		Level 3		Total
Assets
Investments:
Money market funds	$	4,500	$	—	$	—	$	4,500
Marketable securities		2,091		—		—		2,091
Total assets measured at fair value	$	6,591	$	—	$	—	$	6,591
Liabilities
Acquisition-related contingent consideration obligations	$	—	$	—	$	46,526	$	46,526
Total liabilities measured at fair value	$	—	$	—	$	46,526	$	46,526

June 30, 2017	Level 1		Level 2		Level 3		Total
Assets
Investments:
Money market funds	$	4,291	$	—	$	—	$	4,291
Investment in non-marketable equity		—		—		3,000		3,000
Total assets measured at fair value	$	4,291	$	—	$	3,000	$	7,291

Schedule of Change in Acquisition-related Contingent Consideration Obligations

The change in the acquisition-related contingent consideration obligations is as follows (in thousands):

	Three Months Ended			Nine Months Ended
	March 31, 2018			March 31, 2018
Beginning balance	$	47,030		$	—
Initial fair value measurements		—			47,030
Payments		(671	)		(671	)
Accretion on discount		1,401			1,401
Change in fair value		(1,234	)		(1,234	)
Ending balance	$	46,526		$	46,526

Share-based Compensation (Tables)

9 Months Ended

Mar. 31, 2018

Share Based Compensation [Abstract]

Shares Reserved for Issuance

The Company had reserved for issuance for the periods noted (in thousands):

	March 31, 2018		June 30, 2017
2014 Employee Stock Purchase Plan		5,365		7,785
Employee stock options and awards outstanding		10,405		9,726
2013 Equity Incentive Plan shares available for grant		11,944		7,629
Total shares reserved for issuance		27,714		25,140

Schedule of Recognized Share-based Compensation Expense

Share-based compensation expense recognized in the condensed consolidated financial statements by line item caption is as follows (in thousands):

	Three Months Ended				Nine Months Ended
	March 31, 2018		March 31, 2017		March 31, 2018		March 31, 2017
Cost of product revenue	$	163	$	73	$	389	$	262
Cost of service revenue		354		56		783		475
Research and development		2,367		625		5,247		2,593
Sales and marketing		2,735		809		7,077		3,129
General and administrative		2,199		911		6,150		2,869
Total share-based compensation expense	$	7,818	$	2,474	$	19,646	$	9,328

Summary of Stock Award Activity

The following table summarizes stock award activity for the nine months ended March 31, 2018 (in thousands, except grant date fair value):

	Number of Shares			Weighted- Average Grant Date Fair Value		Aggregate Fair Market Value
Non-vested stock awards outstanding at June 30, 2017		6,664		$	4.66	$	61,440
Granted		4,335			11.26
Vested		(2,488	)		3.75
Cancelled		(374	)		7.23
Non-vested stock awards outstanding at March 31, 2018		8,137		$	8.34	$	90,084

Summary of Stock Option Activity

The following table summarizes stock option activity for the nine months ended March 31, 2018 (in thousands, except per share and contractual term):

	Number of Shares			Weighted-Average Exercise Price Per Share		Weighted-Average Remaining Contractual Term (years)		Aggregate Intrinsic Value
Options outstanding at June 30, 2017		3,062		$	4.06		4.19	$	15,868
Exercised		(779	)		4.56
Cancelled		(15	)		4.25
Options outstanding at March 31, 2018		2,268		$	3.89		3.11	$	16,283
Vested and expected to vest at March 31, 2018		2,268		$	3.89		3.11	$	16,283
Exercisable at March 31, 2018		1,961		$	4.10		2.95	$	13,670

Schedule of Fair Value Assumptions for Stock Options and Employee Stock Purchase Plan Awards

The following assumptions were used to calculate the fair value of shares granted under the ESPP during the following periods:

	Three Months Ended						Nine Months Ended
	March 31, 2018			March 31, 2017			March 31, 2018			March 31, 2017
Expected life	0.5 years			0.5 years			0.5 years			0.5 years
Risk-free interest rate		1.15	%		0.40	%	1.64%–1.15%				0.40	%
Volatility		42	%		37	%		42	%	40%–37%
Dividend yield		—	%		—	%		—	%		—	%

Restructuring Charges (Tables)

9 Months Ended

Mar. 31, 2018

Restructuring And Related Activities [Abstract]

Restructuring Liabilities

Total restructuring and related liabilities consist of (in thousands):

	Excess Facilities			Severance Benefits			Other			Total
Balance as of June 30, 2017	$	2,184		$	1,853		$	85		$	4,122
Period charges		—			4,920			—			4,920
Period payments		(516	)		(4,198	)		(73	)		(4,787	)
Balance as of March 31, 2018	$	1,668		$	2,575		$	12		$	4,255
Less: current portion included in Other accrued liabilities											2,920
Restructuring accrual included in Other long-term liabilities										$	1,335

Net Loss Per Share (Tables)

9 Months Ended

Mar. 31, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table presents the calculation of net loss per share of basic and diluted (in thousands, except per share data):

	Three Months Ended						Nine Months Ended
	March 31, 2018			March 31, 2017			March 31, 2018			March 31, 2017
				(As adjusted)						(As adjusted)
Net loss	$	(13,613	)	$	(4,977	)	$	(41,160	)	$	(14,948	)
Weighted-average shares used in per share calculation - basic and diluted		115,059			109,213			113,641			107,531
Net loss per share - basic and diluted	$	(0.12	)	$	(0.05	)	$	(0.36	)	$	(0.14	)

Schedule of Antidilutive Securities Excluded from Earnings Per Share Calculation

The following securities were excluded from the computation of net loss per diluted share of common stock for the periods presented as their effect would have been anti-dilutive (in thousands):

	Three Months Ended				Nine Months Ended
	March 31, 2018		March 31, 2017		March 31, 2018		March 31, 2017
Options to purchase common stock		2,379		—		2,649		398
Restricted stock units		8,213		4		7,670		7
Employee Stock Purchase Plan shares		972		269		1,101		269
Total shares excluded		11,564		273		11,420		674

Disclosure about Segments of an Enterprise and Geographic Areas (Tables)

9 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Schedule of Revenues and Long Lived Assets by Geographic Regions and Channels

The Company attributes revenues to geographic regions and channels based on the customer's ship-to location as follows (in thousands):

	Three Months Ended
	March 31, 2018						March 31, 2017
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	76,392	$	56,929	$	133,321	$	31,972	$	47,367	$	79,339
Other		4,288		6,165		10,453		1,559		1,901		3,460
Total Americas		80,680		63,094		143,774		33,531		49,268		82,799
EMEA:		58,668		36,120		94,788		32,090		20,136		52,226
APAC:		3,085		20,357		23,442		2,399		11,772		14,171
Total net revenues	$	142,433	$	119,571	$	262,004	$	68,020	$	81,176	$	149,196

	Nine Months Ended
	March 31, 2018						March 31, 2017
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	181,415	$	160,484	$	341,899	$	98,026	$	112,592	$	210,618
Other		13,417		20,252		33,669		5,779		14,772		20,551
Total Americas		194,832		180,736		375,568		103,805		127,364		231,169
EMEA:		165,856		97,647		263,503		99,459		61,026		160,485
APAC:		11,480		54,291		65,771		5,464		31,059		36,523
Total net revenues	$	372,168	$	332,674	$	704,842	$	208,728	$	219,449	$	428,177

The Company’s long-lived assets are attributed to the geographic regions as follows (in thousands):

Long-lived Assets	March 31, 2018		June 30, 2017
			(As adjusted)
Americas	$	189,321	$	67,369
EMEA		15,586		8,998
APAC		10,334		4,275
Total long-lived assets	$	215,241	$	80,642

Business Combinations (Narratives) (Details) $ in Thousands						3 Months Ended		9 Months Ended
Business Combinations (Narratives) (Details) $ in Thousands	Dec. 01, 2017 USD ($)	Oct. 27, 2017 USD ($) Quarter	Jul. 14, 2017	Mar. 07, 2017 USD ($)	Oct. 28, 2016 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2018 USD ($) Acquisition	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Number of acquisitions completed \| Acquisition								3
Upfront cash closing payment								$ 97,581	$ 51,088
Acquisition and integration related expenses						$ 9,316	$ 3,418	47,675	$ 9,908
Recorded gain from bargain purchase								5,030
Data Center Business
Business Acquisition [Line Items]
Asset purchase agreement closing date		Oct. 27, 2017
Upfront cash closing payment		$ 23,000
Deferred payment to be paid per quarter		$ 1,000
Number of quarters deferred payment to be paid \| Quarter		20
Quarterly earn out payments in percentage of profits		50.00%
Quarterly earn out payments period		5 years
Increase in revenue								90,200
Acquisition and integration related expenses						5,000		38,800
Business acquisition, purchase price		$ 84,337
Net assets acquired, financing receivables						33,488		33,488		$ 33,488
Net assets acquired, identifiable intangible assets						32,200		32,200		28,600
Broadcom Corporation
Business Acquisition [Line Items]
Consent fee paid to terminate previous asset purchase agreement						25,000
Campus Fabric Business
Business Acquisition [Line Items]
Asset purchase agreement closing date			Jul. 14, 2017
Increase in revenue								127,700
Acquisition and integration related expenses						4,400		13,900
Business acquisition, purchase price				$ 100,000
Business acquisition, provisional consideration				$ 79,800
Net assets acquired, financing receivables						18,712		18,712		18,295
Net assets acquired, identifiable intangible assets						42,200		42,200		$ 46,900
Campus Fabric Business \| In-Process Research and Development
Business Acquisition [Line Items]
Fair value of indefinite lived intangibles						2,600		2,600
Campus Fabric Business \| Developed Technology
Business Acquisition [Line Items]
Fair value of indefinite lived intangibles						$ 2,600		$ 2,600
Capital Financing Business
Business Acquisition [Line Items]
Asset purchase agreement closing date	Dec. 01, 2017
Business combination, payments to seller in percentage of finance receivables	90.00%
Net assets acquired, financing receivables	$ 13,700
Net assets acquired, lease equipment	3,500
Net assets acquired, identifiable intangible assets	800
Fair value of contingent consideration	13,000
Capital Financing Business \| Acquisition and Integration Costs
Business Acquisition [Line Items]
Recorded gain from bargain purchase	$ 5,000
Zebra Technologies Corporation
Business Acquisition [Line Items]
Asset purchase agreement closing date					Oct. 28, 2016
Net assets acquired, financing receivables					$ 14,636
Net assets acquired, identifiable intangible assets					20,300
Net cash consideration					$ 49,500

Business Combinations (Components of Aggregate Estimated Purchase Consideration) (Details) - USD ($) $ in Thousands		9 Months Ended
	Oct. 27, 2017	Mar. 31, 2018	Mar. 31, 2017
Business Acquisition [Line Items]
Cash paid to sellers at closing		$ 97,581	$ 51,088
Data Center Business
Business Acquisition [Line Items]
Cash paid to sellers at closing	$ 23,000
Deferred payments	18,430
Contingent consideration	34,100
Working capital adjustment	6,534
Replacement of stock-based awards	2,273
Aggregate estimated purchase consideration	$ 84,337

Business Combinations (Summary of Preliminary Allocation of Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017
Preliminary Allocation
Goodwill	$ 129,244		$ 80,216
Data Center Business
Preliminary Allocation
Accounts receivables	33,488	$ 33,488
Inventories	19,934	19,973
Prepaid expenses and other current assets	988	988
Property and equipment	29,160	29,160
Other assets	4,734	4,734
Accounts payable and accrued expenses	(15,737)	(15,850)
Deferred revenue	(33,025)	(33,519)
Total tangible assets acquired and liabilities assumed	39,542	38,974
Identifiable intangible assets	32,200	28,600
Goodwill	12,595	16,763
Total intangible assets acquired	44,795	45,363
Total net assets acquired	84,337	84,337
Change during three months ended March 31, 2018
Adjustments, Inventory	(39)
Adjustments, Accounts payable and accrued expenses	113
Adjustments, Deferred revenue	494
Adjustments, Net tangible assets acquired	568
Adjustments, Identifiable intangible assets	3,600
Adjustments, Goodwill	(4,168)
Adjustments, Total intangible assets acquired	(568)
Campus Fabric Business
Preliminary Allocation
Accounts receivables	18,712	18,295
Inventories	15,545	15,545
Prepaid expenses and other current assets	649	673
Property and equipment	5,406	3,768
Other assets	4,794	5,311
Accounts payable and accrued expenses	(32,314)	(31,919)
Deferred revenue	(8,994)	(10,051)
Other long-term liabilities	(5,205)	(5,205)
Total tangible assets acquired and liabilities assumed	(1,407)	(3,583)
Identifiable intangible assets	42,200	46,900
In-process research and development	2,600	2,500
Goodwill	36,433	34,009
Total intangible assets acquired	81,233	83,409
Total net assets acquired	79,826	$ 79,826
Change during three months ended March 31, 2018
Adjustments, Accounts receivables	417
Adjustments, Prepaid expenses and other current assets	(24)
Adjustments, Property and equipment	1,638
Adjustments, Other assets	(517)
Adjustments, Accounts payable and accrued expenses	(395)
Adjustments, Deferred revenue	1,057
Adjustments, Net tangible assets acquired	2,176
Adjustments, Identifiable intangible assets	(4,700)
Adjustments, In-process research and development	100
Adjustments, Goodwill	2,424
Adjustments, Total intangible assets acquired	$ (2,176)

Business Combinations (Schedule of Identifiable Intangible Assets Acquired as Part of Acquisition) (Details) - USD ($) $ in Thousands	Oct. 27, 2017	Jul. 14, 2017
Data Center Business
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 32,200
Data Center Business \| Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 25,400
Data Center Business \| Developed technology \| Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	2 years
Data Center Business \| Developed technology \| Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	5 years
Data Center Business \| Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	5 years
Amount	$ 5,400
Data Center Business \| Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)	4 years
Amount	$ 1,400
Campus Fabric Business
Acquired Finite-Lived Intangible Assets [Line Items]
Amount		$ 42,200
Campus Fabric Business \| Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Amount		$ 32,700
Campus Fabric Business \| Developed technology \| Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)		2 years
Campus Fabric Business \| Developed technology \| Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)		4 years
Campus Fabric Business \| Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)		4 years
Amount		$ 5,100
Campus Fabric Business \| Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Amount		$ 2,600
Campus Fabric Business \| Trade names \| Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)		4 years
Campus Fabric Business \| Trade names \| Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)		5 years
Campus Fabric Business \| Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)		1 year
Amount		$ 1,800

Business Combinations (Summary of Final Allocation of Tangible and Identifiable Intangible Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017	Oct. 28, 2016
Final Allocation
Goodwill	$ 129,244	$ 80,216
Zebra Technologies Corporation
Final Allocation
Accounts receivables, net			$ 14,636
Inventories			13,593
Other current assets			808
Property and equipment			3,159
Other assets			7,634
Deferred revenue			(14,159)
Other liabilities			(7,201)
Total tangible assets acquired and liabilities assumed			18,470
Identifiable intangible assets			20,300
In-process research and development			1,400
Goodwill			9,339
Total intangible assets acquired			31,039
Total net assets acquired			$ 49,509

Business Combinations (Summary of Unaudited Pro Forma Financial Information) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Business Acquisition Pro Forma Information [Abstract]
Net revenues	$ 262,004	$ 267,176	$ 799,044	$ 911,611
Net loss	$ (13,613)	$ (40,235)	$ (21,235)	$ (136,207)
Net loss per share - basic	$ (0.12)	$ (0.37)	$ (0.19)	$ (1.27)
Net loss per share - diluted	$ (0.12)	$ (0.37)	$ (0.19)	$ (1.27)
Shares used in per share calculation - basic	115,059	109,213	113,641	107,531
Shares used in per share calculation - diluted	115,059	109,213	113,641	107,531

Summary of Significant Accounting Policies (Narratives) (Details)	3 Months Ended		9 Months Ended
	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2018 USD ($) Distribution_Channels	Mar. 31, 2017 USD ($)	Jun. 30, 2017 USD ($)
Significant Accounting Policies [Line Items]
Number of distribution channels \| Distribution_Channels			2
Estimated selling price determination approach			Certain of the Company’s contracts have multiple performance obligations, as the promise to transfer individual goods or services is separately identifiable from other promises in the contracts and, therefore, is distinct. For contracts with multiple performance obligations, the Company allocates the contract’s transaction price to each performance obligation based on its relative standalone selling price. The stand-alone selling prices are determined based on the prices at which the Company separately sells these products. For items that are not sold separately, the Company estimates the stand-alone selling prices using the best estimated selling price approach.
Remaining revenue performance obligations	$ 156,600,000		$ 156,600,000
Remaining revenue performance obligation, percentage of revenue expected to be recognized in 2018			33.00%
Remaining revenue performance obligation, percentage of revenue expected to be recognized in 2019			48.00%
Remaining revenue performance obligation, percentage of revenue expected to be recognized thereafter			19.00%
Revenue recognized for deferred revenue balance	50,600,000	$ 31,300,000	$ 66,700,000	$ 61,400,000
Commission Fees
Significant Accounting Policies [Line Items]
Contract costs capitalized, amount	3,100,000		$ 3,100,000		$ 2,500,000
Contract costs capitalized, amortization period			3 years
Contract costs capitalized, amortization method			straight-line basis
Contract costs capitalized, amortization expense	$ 500,000	$ 400,000	$ 1,400,000	$ 1,100,000
Contract costs capitalized, impairment loss			$ 0
Minimum
Significant Accounting Policies [Line Items]
Contractual service period			1 year
Maximum
Significant Accounting Policies [Line Items]
Contractual service period			3 years

Summary of Significant Accounting Policies (Schedule of Revenues by Sales Channel and Geographic Regions) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Significant Accounting Policies [Line Items]
Net Revenues	$ 262,004	$ 149,196	$ 704,842	$ 428,177
Distributor
Significant Accounting Policies [Line Items]
Net Revenues	142,433	68,020	372,168	208,728
Direct
Significant Accounting Policies [Line Items]
Net Revenues	119,571	81,176	332,674	219,449
United States
Significant Accounting Policies [Line Items]
Net Revenues	133,321	79,339	341,899	210,618
United States \| Distributor
Significant Accounting Policies [Line Items]
Net Revenues	76,392	31,972	181,415	98,026
United States \| Direct
Significant Accounting Policies [Line Items]
Net Revenues	56,929	47,367	160,484	112,592
Other Americas
Significant Accounting Policies [Line Items]
Net Revenues	10,453	3,460	33,669	20,551
Other Americas \| Distributor
Significant Accounting Policies [Line Items]
Net Revenues	4,288	1,559	13,417	5,779
Other Americas \| Direct
Significant Accounting Policies [Line Items]
Net Revenues	6,165	1,901	20,252	14,772
Total Americas
Significant Accounting Policies [Line Items]
Net Revenues	143,774	82,799	375,568	231,169
Total Americas \| Distributor
Significant Accounting Policies [Line Items]
Net Revenues	80,680	33,531	194,832	103,805
Total Americas \| Direct
Significant Accounting Policies [Line Items]
Net Revenues	63,094	49,268	180,736	127,364
EMEA
Significant Accounting Policies [Line Items]
Net Revenues	94,788	52,226	263,503	160,485
EMEA \| Distributor
Significant Accounting Policies [Line Items]
Net Revenues	58,668	32,090	165,856	99,459
EMEA \| Direct
Significant Accounting Policies [Line Items]
Net Revenues	36,120	20,136	97,647	61,026
APAC
Significant Accounting Policies [Line Items]
Net Revenues	23,442	14,171	65,771	36,523
APAC \| Distributor
Significant Accounting Policies [Line Items]
Net Revenues	3,085	2,399	11,480	5,464
APAC \| Direct
Significant Accounting Policies [Line Items]
Net Revenues	$ 20,357	$ 11,772	$ 54,291	$ 31,059

Recent Accounting Pronouncements - (Narratives) (Details) - Topic 606	9 Months Ended
	Mar. 31, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Contract acquisition costs capitalization, description	Company capitalizes contract acquisition costs such as commissions paid for maintenance services contracts in excess of one year
Minimum
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Contract acquisition costs capitalization period	1 year

Recent Accounting Pronouncements - Schedule of Effect of Adoption of Topic 606 On Condensed Consolidated Balance Sheet (Unaudited) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounts receivable, net	$ 188,408		$ 93,115
Inventories	77,756		47,410
Total current assets	396,000		298,842
Other assets	43,348		25,065
Total assets	740,485		459,700
Accrued warranty	12,812	$ 13,010	10,584	$ 10,603	$ 10,790	$ 9,998
Other accrued liabilities	77,042		37,044
Total current liabilities	363,706		213,205
Accumulated deficit	(822,446)		(781,286)
Total stockholders’ equity	112,925		125,678
Total liabilities and stockholders’ equity	$ 740,485		459,700
As Reported
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounts receivable, net			120,770
Inventories			45,880
Total current assets			324,967
Other assets			22,586
Total assets			483,346
Accrued warranty			10,007
Other accrued liabilities			36,713
Deferred distributors revenue, net of cost of sales to distributors			43,525
Total current liabilities			255,822
Accumulated deficit			(800,257)
Total stockholders’ equity			106,707
Total liabilities and stockholders’ equity			483,346
Adjustment \| Topic 606
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounts receivable, net			(27,655)
Inventories			1,530
Total current assets			(26,125)
Other assets			2,479
Total assets			(23,646)
Accrued warranty			577
Other accrued liabilities			331
Deferred distributors revenue, net of cost of sales to distributors			(43,525)
Total current liabilities			(42,617)
Accumulated deficit			18,971
Total stockholders’ equity			18,971
Total liabilities and stockholders’ equity			$ (23,646)

Recent Accounting Pronouncements - Schedule of Effect of Adoption of Topic 606 On Condensed Consolidated Statement of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Net revenues:
Product	$ 203,527	$ 111,321	$ 543,151	$ 319,469
Service	58,477	37,875	161,691	108,708
Total net revenues	262,004	149,196	704,842	428,177
Cost of revenues:
Product	94,485	52,275	253,002	159,151
Service	24,536	14,117	67,490	40,684
Total cost of revenues	119,021	66,392	320,492	199,835
Gross profit:
Product	109,042	59,046	290,149	160,318
Service	33,941	23,758	94,201	68,024
Total gross profit	142,983	82,804	384,350	228,342
Sales and marketing expenses	72,240	38,790	193,460	116,674
Operating loss	(8,221)	(2,619)	(34,839)	(9,621)
Net loss before tax	(11,884)	(3,811)	(39,373)	(11,696)
Net loss	$ (13,613)	$ (4,977)	$ (41,160)	$ (14,948)
Basic and diluted net loss per share
Net loss per share - basic	$ (0.12)	$ (0.05)	$ (0.36)	$ (0.14)
Net loss per share - diluted	$ (0.12)	$ (0.05)	$ (0.36)	$ (0.14)
Shares used in per share calculation - basic	115,059	109,213	113,641	107,531
Shares used in per share calculation - diluted	115,059	109,213	113,641	107,531
As Reported
Net revenues:
Product		$ 110,789		$ 310,709
Service		37,875		108,708
Total net revenues		148,664		419,417
Cost of revenues:
Product		52,401		155,987
Service		14,117		40,684
Total cost of revenues		66,518		196,671
Gross profit:
Product		58,388		154,722
Service		23,758		68,024
Total gross profit		82,146		222,746
Sales and marketing expenses		38,759		116,824
Operating loss		(3,246)		(15,367)
Net loss before tax		(4,438)		(17,442)
Net loss		$ (5,604)		$ (20,694)
Basic and diluted net loss per share
Net loss per share - basic		$ (0.05)		$ (0.19)
Net loss per share - diluted		$ (0.05)		$ (0.19)
Shares used in per share calculation - basic		109,213		107,531
Shares used in per share calculation - diluted		109,213		107,531
Adjustment \| Topic 606
Net revenues:
Product		$ 532		$ 8,760
Total net revenues		532		8,760
Cost of revenues:
Product		(126)		3,164
Total cost of revenues		(126)		3,164
Gross profit:
Product		658		5,596
Total gross profit		658		5,596
Sales and marketing expenses		31		(150)
Operating loss		627		5,746
Net loss before tax		627		5,746
Net loss		$ 627		$ 5,746

Recent Accounting Pronouncements - Schedule of Effect of Adoption of Topic 606 On Condensed Consolidated Statement of Cash Flows (Unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net loss	$ (13,613)	$ (4,977)	$ (41,160)	$ (14,948)
Changes in operating assets and liabilities, net
Accounts receivable			(45,376)	7,232
Inventories			5,122	4,724
Prepaid expenses and other assets			(3,711)	8,031
Other current and long-term liabilities			2,743	6,194
Net cash provided by operating activities			(1,730)	43,961
Cash flows from investing activities			(114,658)	(69,159)
Cash flows from financing activities			89,214	48,328
Foreign currency effect on cash			(99)	28
Net increase in cash and cash equivalents			$ (27,273)	23,158
As Reported
Cash flows from operating activities:
Net loss		(5,604)		(20,694)
Changes in operating assets and liabilities, net
Accounts receivable				(5,926)
Inventories				6,344
Prepaid expenses and other assets				8,181
Deferred distributors revenue, net of cost of sales to distributors				17,441
Other current and long-term liabilities				5,887
Net cash provided by operating activities				43,961
Cash flows from investing activities				(69,159)
Cash flows from financing activities				48,328
Foreign currency effect on cash				28
Net increase in cash and cash equivalents				23,158
Adjustment \| Topic 606
Cash flows from operating activities:
Net loss		$ 627		5,746
Changes in operating assets and liabilities, net
Accounts receivable				13,158
Inventories				(1,620)
Prepaid expenses and other assets				(150)
Deferred distributors revenue, net of cost of sales to distributors				(17,441)
Other current and long-term liabilities				$ 307

Balance Sheet Accounts (Summary of Cash, Cash Equivalents and Marketable Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Cash	$ 98,677	$ 126,159
Cash equivalents	4,500	4,291
Total cash and cash equivalents	103,177	130,450	$ 117,280	$ 94,122
Marketable securities (consisting of available-for-sale securities)	2,091
Total cash, cash equivalents and marketable securities	$ 105,268	$ 130,450

Balance Sheet Accounts (Narratives) (Details) - USD ($)				3 Months Ended	9 Months Ended
Balance Sheet Accounts (Narratives) (Details) - USD ($)	May 01, 2018	Oct. 26, 2017	Jul. 14, 2017	Sep. 30, 2017	Mar. 31, 2018	Mar. 31, 2017	Oct. 28, 2016
Balance Sheet Accounts [Line Items]
Additional goodwill related to acquisition					$ 49,028,000
Borrowings under Term Loan					$ 100,000,000	$ 48,250,000
Standard hardware warranty period (in months)					12 months
Standard software warranty period (in days)					90 days
Limited lifetime hardware warranty maximum period after end of sale of product (in years)					5 years
Maximum investment in one obligor or maker (percent)					10.00%
Accounts Receivable \| Westcon Group Inc.
Balance Sheet Accounts [Line Items]
Concentration risk (percent)					14.00%
Accounts Receivable \| Tech Data Corporation
Balance Sheet Accounts [Line Items]
Concentration risk (percent)					18.00%
Term Loan
Balance Sheet Accounts [Line Items]
Interest rate, floor					0.00%
Term Loan \| London Interbank Offered Rate (LIBOR)
Balance Sheet Accounts [Line Items]
Interest rate, applicable margin					3.25%
Term Loan \| Adjusted Base Rate
Balance Sheet Accounts [Line Items]
Interest rate, applicable margin					1.25%
Revolving Facility
Balance Sheet Accounts [Line Items]
Interest rate, floor					0.00%
Borrowings available under facility					$ 48,800,000
Outstanding letters of credit					$ 1,200,000
Revolving Facility \| London Interbank Offered Rate (LIBOR)
Balance Sheet Accounts [Line Items]
Interest rate, applicable margin					3.25%
Revolving Facility \| Adjusted Base Rate
Balance Sheet Accounts [Line Items]
Interest rate, applicable margin					1.25%
Second Amendment \| Subsequent Event
Balance Sheet Accounts [Line Items]
Termination date	May 01, 2018
New Credit Agreement \| Subsequent Event
Balance Sheet Accounts [Line Items]
Commitment fee	0.35%
New Credit Agreement \| Term Loan \| Subsequent Event
Balance Sheet Accounts [Line Items]
Borrowing capacity from Credit Agreement	$ 190,000,000
Credit Facility, as amended term	5 years
New Credit Agreement \| Revolving Facility \| Subsequent Event
Balance Sheet Accounts [Line Items]
Borrowing capacity from Credit Agreement	$ 40,000,000
Credit Facility, as amended term	5 years
New Credit Agreement \| New Senior Secured Credit Facilities \| Subsequent Event
Balance Sheet Accounts [Line Items]
Credit facility, borrowed amount	$ 200,000,000
Campus Fabric Business
Balance Sheet Accounts [Line Items]
Additional goodwill related to acquisition					$ 36,400,000
Borrowings under Term Loan			$ 80,000,000
Campus Fabric Business \| Credit Facility
Balance Sheet Accounts [Line Items]
Borrowing capacity from Credit Agreement							$ 140,500,000
Campus Fabric Business \| Second Amendment \| Credit Facility
Balance Sheet Accounts [Line Items]
Borrowing capacity from Credit Agreement			243,700,000
Campus Fabric Business \| Second Amendment \| Term Loan
Balance Sheet Accounts [Line Items]
Borrowing capacity from Credit Agreement			$ 183,700,000
Credit Facility, as amended term			5 years
Campus Fabric Business \| Second Amendment \| Revolving Facility
Balance Sheet Accounts [Line Items]
Borrowing capacity from Credit Agreement			$ 60,000,000
Credit Facility, as amended term			5 years
Data Center Business
Balance Sheet Accounts [Line Items]
Additional goodwill related to acquisition					$ 12,600,000
Data Center Business \| Term Loan
Balance Sheet Accounts [Line Items]
Borrowings under Term Loan		$ 20,000,000
Developed technology \| In-process research and development, with indefinite life
Balance Sheet Accounts [Line Items]
In-process research and development reclassified to developed technology				$ 1,400,000
Maximum
Balance Sheet Accounts [Line Items]
Extended warranty period					5 years
Maximum \| Revolving Facility
Balance Sheet Accounts [Line Items]
Commitment fee					0.50%
Maximum \| New Credit Agreement \| Subsequent Event
Balance Sheet Accounts [Line Items]
Commitment fee	0.40%
Maximum \| New Credit Agreement \| London Interbank Offered Rate (LIBOR) \| Subsequent Event
Balance Sheet Accounts [Line Items]
Interest rate, applicable margin	2.75%
Maximum \| New Credit Agreement \| Adjusted Base Rate \| Subsequent Event
Balance Sheet Accounts [Line Items]
Interest rate, applicable margin	1.75%
Maximum \| Campus Fabric Business \| Second Amendment
Balance Sheet Accounts [Line Items]
Additional incremental loan facility			$ 50,000,000
Minimum
Balance Sheet Accounts [Line Items]
Extended warranty period					1 year
Minimum \| Revolving Facility
Balance Sheet Accounts [Line Items]
Commitment fee					0.375%
Minimum \| New Credit Agreement \| Subsequent Event
Balance Sheet Accounts [Line Items]
Commitment fee	0.25%
Minimum \| New Credit Agreement \| London Interbank Offered Rate (LIBOR) \| Subsequent Event
Balance Sheet Accounts [Line Items]
Interest rate, applicable margin	1.50%
Minimum \| New Credit Agreement \| Adjusted Base Rate \| Subsequent Event
Balance Sheet Accounts [Line Items]
Interest rate, applicable margin	0.50%
Cash equivalents \| Maximum
Balance Sheet Accounts [Line Items]
Maturity period for investments					3 months

Balance Sheet Accounts (Components of Inventories) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Finished goods	$ 63,306	$ 46,620
Raw materials	14,450	790
Total Inventories	$ 77,756	$ 47,410

Balance Sheet Accounts (Components of Property and Equipment) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 151,802	$ 80,399
Less: accumulated depreciation and amortization	(65,315)	(50,159)
Property and equipment, net	86,487	30,240
Computers and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	69,712	34,716
Purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	16,908	11,785
Office equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	18,143	10,852
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 47,039	$ 23,046

Balance Sheet Accounts (Components of Gross and Net Intangible Asset Balances) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Mar. 31, 2018	Jun. 30, 2017
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 200,866	$ 121,627
Accumulated Amortization	115,460	97,690
Net Carrying Amount	85,406	23,937
Gross Carrying Amount, Intangibles		123,027
Net Carrying Amount, Intangibles	$ 85,406	25,337
In-process research and development, with indefinite life
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Fair value of indefinite lived intangibles		$ 1,400
Developed technology
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	3 years 9 months 18 days	5 years 3 months 18 days
Gross Carrying Amount	$ 117,500	$ 55,400
Accumulated Amortization	52,860	42,689
Net Carrying Amount	$ 64,640	$ 12,711
Customer relationships
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	3 years 8 months 12 days	3 years 3 months 18 days
Gross Carrying Amount	$ 51,639	$ 40,300
Accumulated Amortization	39,577	37,567
Net Carrying Amount	$ 12,062	$ 2,733
Maintenance contracts
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	7 months 6 days	1 year 3 months 18 days
Gross Carrying Amount	$ 17,000	$ 17,000
Accumulated Amortization	15,016	12,467
Net Carrying Amount	$ 1,984	$ 4,533
Trade names
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	3 years 8 months 12 days	4 years 3 months 18 days
Gross Carrying Amount	$ 9,100	$ 5,100
Accumulated Amortization	3,776	2,846
Net Carrying Amount	5,324	$ 2,254
Backlogs
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,800
Accumulated Amortization	$ 1,800
License agreements
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	5 years 10 months 24 days	6 years 4 months 24 days
Gross Carrying Amount	$ 2,445	$ 2,445
Accumulated Amortization	1,323	1,120
Net Carrying Amount	$ 1,122	$ 1,325
Other intangibles
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	1 year 10 months 24 days	2 years 8 months 12 days
Gross Carrying Amount	$ 1,382	$ 1,382
Accumulated Amortization	1,108	1,001
Net Carrying Amount	$ 274	$ 381

Balance Sheet Accounts (Summary of Amortization Expense of Intangibles) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Amortization in “Cost of revenues: Product”	$ 4,647	$ 995	$ 11,310	$ 6,271
Amortization of intangibles	2,101	1,193	6,461	7,510
Total amortization	$ 6,748	$ 2,188	$ 17,771	$ 13,781

Balance Sheet Accounts (Summary of Goodwill) (Details) $ in Thousands	9 Months Ended
	Mar. 31, 2018 USD ($)
Goodwill [Roll Forward]
Balance as of June 30, 2017	$ 80,216
Additions due to acquisitions	49,028
Balance at end of period	$ 129,244

Balance Sheet Accounts (Components of Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017
Line Of Credit Facility [Line Items]
Current portion of long-term debt	$ 24,720	$ 12,280
Less: unamortized debt issuance costs	(540)	(164)
Long-term debt, less current portion	153,958	80,422
Less: unamortized debt issuance costs	(1,215)	(846)
Total debt	178,678	92,702
Term Loan
Line Of Credit Facility [Line Items]
Current portion of long-term debt	25,260	12,444
Long-term debt, less current portion	145,173	71,268
Revolver
Line Of Credit Facility [Line Items]
Long-term debt, less current portion	$ 10,000	$ 10,000

Balance Sheet Accounts (Summary of Product Warranty Liability Activity) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance beginning of period	$ 13,010	$ 10,790	$ 10,584	$ 9,998
Warranties assumed due to acquisitions			3,682	2,034
New warranties issued	2,872	1,893	6,801	3,997
Warranty expenditures	(3,070)	(2,080)	(8,255)	(5,426)
Balance end of period	$ 12,812	$ 10,603	$ 12,812	$ 10,603

Balance Sheet Accounts (Summary of Long-term Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Acquisition related deferred payments, less current portion	$ 14,147
Acquisition-related contingent consideration obligations, less current portion	33,256
Other	18,037	$ 8,526
Total other long-term liabilities	$ 65,440	$ 8,526

Balance Sheet Accounts (Schedule of Major Customers Accounting for 10% or More of Net Revenues) (Details) - Net Revenues	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Tech Data Corporation
Concentration Risk [Line Items]
Concentration risk (percent)	14.00%	13.00%	13.00%	15.00%
Jenne Corporation
Concentration Risk [Line Items]
Concentration risk (percent)	13.00%	14.00%	11.00%	14.00%
Westcon Group Inc.
Concentration Risk [Line Items]
Concentration risk (percent)	14.00%	10.00%	14.00%	11.00%

Fair Value Measurements (Schedule of Fair Value for Financial Assets and Liabilities Measured on Recurring Basis) (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017
Assets
Total assets measured at fair value	$ 6,591	$ 7,291
Liabilities
Acquisition-related contingent consideration obligations	46,526
Total liabilities measured at fair value	46,526
Money market funds
Assets
Investments	4,500	4,291
Marketable securities
Assets
Investments	2,091
Investment in non-marketable equity
Assets
Investments		3,000
Level 1
Assets
Total assets measured at fair value	6,591	4,291
Level 1 \| Money market funds
Assets
Investments	4,500	4,291
Level 1 \| Marketable securities
Assets
Investments	2,091
Level 3
Assets
Total assets measured at fair value		3,000
Liabilities
Acquisition-related contingent consideration obligations	46,526
Total liabilities measured at fair value	$ 46,526
Level 3 \| Investment in non-marketable equity
Assets
Investments		$ 3,000

Fair Value Measurements (Narratives) (Details) - USD ($)	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2015	Jun. 30, 2017
Level 1 Investments
Assets
Unrealized holding gain on investments		$ 700,000
Level 2 Assets and Liabilities
Assets
Transfers of assets between Level 1 and Level 2		0			$ 0
Transfers of Liabilities between Level 1 and Level 2		0			0
Long-term debt, fair value		$ 178,700,000			$ 93,700,000
Level 3 Assets and Liabilities
Assets
Purchases of non-marketable equity investment				$ 3,000,000
Consideration from sale of non-marketable equity investment	$ 6,800,000
Consideration from sale of non-marketable equity investment in cash	5,400,000
Consideration from sale of non-marketable equity investment	5,800,000
Sale of non-marketable equity investment in cash	$ 4,900,000
Shares received for sale of non-marketable equity investment	41,685
Shares held in escrow		23,252
Sale of non-marketable equity investment in shares market value	$ 900,000
Remaining consideration from non-marketable securities in cash	500,000
Remaining consideration from non-marketable securities in shares	$ 500,000
Escrow period		18 months
Transfers of assets between Level 2 and Level 3		$ 0	$ 0
Transfers of liabilities between Level 2 and Level 3		0	0
Intangible asset and goodwill impairment		0	$ 0
Level 3 Assets and Liabilities \| Common Stock
Assets
Consideration in shares for sale of non-marketable investment	65,937
Consideration from sale of non-marketable equity investment in shares market value	$ 1,400,000
Level 3 Assets and Liabilities \| Other Income (Expense), Net
Assets
Gain on investments		$ 3,800,000

Fair Value Measurements (Schedule of Change in Acquisition-related Contingent Consideration Obligations) (Details) - Level 3 Assets and Liabilities - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2018	Mar. 31, 2018
Business Acquisition Contingent Consideration [Line Items]
Beginning balance	$ 47,030
Initial fair value measurements		$ 47,030
Payments	(671)	(671)
Accretion on discount	1,401	1,401
Change in fair value	(1,234)	(1,234)
Ending balance	$ 46,526	$ 46,526

Share-based Compensation (Shares Reserved for Issuance) (Details) - shares shares in Thousands	Mar. 31, 2018	Jun. 30, 2017
Class Of Stock [Line Items]
Shares reserved for issuance	27,714	25,140
2014 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Shares reserved for issuance	5,365	7,785
Employee Stock Options and Awards Outstanding
Class Of Stock [Line Items]
Shares reserved for issuance	10,405	9,726
2013 Equity Incentive Plan Shares Available for Grant
Class Of Stock [Line Items]
Shares reserved for issuance	11,944	7,629

Share-based Compensation (Schedule of Recognized Share-based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 7,818	$ 2,474	$ 19,646	$ 9,328
Cost of Product Revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	163	73	389	262
Cost of Service Revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	354	56	783	475
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	2,367	625	5,247	2,593
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	2,735	809	7,077	3,129
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 2,199	$ 911	$ 6,150	$ 2,869

Share-based Compensation (Summary of Stock Award Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Mar. 31, 2018 USD ($) $ / shares shares	Jun. 30, 2017 USD ($)
Number of Shares
Non-vested stock awards outstanding at June 30, 2017 \| shares	6,664
Granted \| shares	4,335
Vested \| shares	(2,488)
Cancelled \| shares	(374)
Non-vested stock awards outstanding at March 31, 2018 \| shares	8,137
Weighted-Average Grant Date Fair Value
Non-vested stock awards outstanding at June 30, 2017 \| $ / shares	$ 4.66
Granted \| $ / shares	11.26
Vested \| $ / shares	3.75
Cancelled \| $ / shares	7.23
Non-vested stock awards outstanding at March 31, 2018 \| $ / shares	$ 8.34
Aggregate Fair Market Value
Non-vested stock awards outstanding at June 30, 2017 \| $	$ 90,084	$ 61,440

Share-based Compensation (Summary of Stock Option Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Mar. 31, 2018	Jun. 30, 2017
Number of Shares
Options outstanding at June 30, 2017	3,062
Exercised	(779)
Cancelled	(15)
Options outstanding at March 31, 2018	2,268	3,062
Vested and expected to vest at March 31, 2018	2,268
Exercisable at March 31, 2018	1,961
Weighted-Average Exercise Price Per Share
Options outstanding at June 30, 2017	$ 4.06
Exercised	4.56
Cancelled	4.25
Options outstanding at March 31, 2018	3.89	$ 4.06
Vested and expected to vest at March 31, 2018	3.89
Exercisable at March 31, 2018	$ 4.10
Weighted-Average Remaining Contractual Term
Options outstanding	3 years 1 month 9 days	4 years 2 months 8 days
Vested and expected to vest at March 31, 2018	3 years 1 month 9 days
Exercisable at March 31, 2018	2 years 11 months 12 days
Aggregate Intrinsic Value
Options outstanding	$ 16,283	$ 15,868
Vested and expected to vest at March 31, 2018	16,283
Exercisable at March 31, 2018	$ 13,670

Share-based Compensation (Narratives) (Details)	3 Months Ended						9 Months Ended
Share-based Compensation (Narratives) (Details)	Mar. 31, 2018 $ / shares shares	Dec. 31, 2017 shares	Sep. 30, 2017 Quarter $ / shares shares	Mar. 31, 2017 $ / shares shares	Dec. 31, 2016 shares	Sep. 30, 2016 $ / shares shares	Mar. 31, 2018 $ / shares shares	Mar. 31, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted \| shares							4,335,000
Restricted stock units granted, grant date fair value							$ 11.26
2014 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted \| shares	1,151,759			1,114,707			2,419,689	2,218,306
Weighted-average grant-date fair value of options granted (in dollars per share)	$ 4.00			$ 1.34			$ 3.26	$ 1.24
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted, percentage			40.00%
Share-based compensation arrangement by share-based payment award, award vesting percentage			The RSUs vest from the original grant date as to one-third (1/3) on the one-year anniversary and one-twelfth (1/12) each quarter thereafter, subject to continued service to the Company.			The RSUs vest from the original grant date as to one-third (1/3) on the one-year anniversary and one-twelfth (1/12) each quarter thereafter, subject to continued service to the Company.
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted \| shares	0	0			0		0
Restricted stock units granted, grant date fair value			$ 10.90
Performance Shares \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted, grant date fair value						$ 3.02
Performance Shares \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted, grant date fair value						$ 3.09
Service-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted, percentage			50.00%			50.00%
Market-Based Vesting \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted, grant date fair value	$ 10.61
Market-Based Vesting \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted, grant date fair value	$ 12.19
VPs \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted \| shares			1,154,014			1,505,120
VPs \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted, percentage			50.00%			50.00%
VPs \| Market-Based Vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted \| shares	100,000
Executive Officers \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted \| shares			560,344			680,000
Other Employees \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted \| shares			939,925			1,053,300
Chief Executive Officers \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted, percentage			60.00%
Employees \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock unit vesting, earnings per share			$ 0.32
Performance stock unit vesting, consecutive quarters \| Quarter			2
Restricted stock units vesting, stock trigger price			$ 16.00			$ 5.00
Restricted stock units vesting, Threshold consecutive trading days after January 1, 2017						30 days

Share-based Compensation (Schedule of Fair Value Assumptions for Stock Options and Employee Stock Purchase Plan Awards) (Details) - Employee Stock Purchase Plan	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected life	6 months	6 months	6 months	6 months
Risk-free interest rate	1.15%	0.40%		0.40%
Risk-free interest rate, maximum			1.64%
Risk-free interest rate, minimum			1.15%
Volatility	42.00%	37.00%	42.00%
Volatility, maximum				40.00%
Volatility, minimum				37.00%

Restructuring Charges (Narratives) (Details) $ in Thousands	3 Months Ended			9 Months Ended
Restructuring Charges (Narratives) (Details) $ in Thousands	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($) Employee	Dec. 31, 2016 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges, net of reversals	$ 4,920	$ 7,719		$ 4,920	$ 9,572
Net adjustments associated with sublease		1,500
Restructuring charges				$ 4,920
Sub Lease Income for Non-cancelable Lease Payments for Excess Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 100
2018 Reduction-in-force
Restructuring Cost and Reserve [Line Items]
Severance and benefits charges	$ 4,900
2017 Reduction-in-force
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges, net of reversals		7,700			9,600
Accelerated depreciation of leasehold improvements		900			$ 2,600
Reduction-in-force
Restructuring Cost and Reserve [Line Items]
Severance and benefits charges		$ 5,300
Number of employees eliminated under reduction-in-force \| Employee		90

Restructuring Charges (Restructuring Liabilities) (Details) $ in Thousands	9 Months Ended
	Mar. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 4,122
Period charges	4,920
Period payments	(4,787)
Ending balance	4,255
Less: current portion included in Other accrued liabilities	2,920
Restructuring accrual included in Other long-term liabilities	1,335
Excess Facilities
Restructuring Cost and Reserve [Line Items]
Beginning balance	2,184
Period payments	(516)
Ending balance	1,668
Severance Benefits
Restructuring Cost and Reserve [Line Items]
Beginning balance	1,853
Period charges	4,920
Period payments	(4,198)
Ending balance	2,575
Other
Restructuring Cost and Reserve [Line Items]
Beginning balance	85
Period payments	(73)
Ending balance	$ 12

Commitments and Contingencies (Narratives) (Details) - Mar. 31, 2018 R$ in Millions	USD ($)	BRL (R$)
Foreign \| Secretariat of the Federal Revenue Bureau of Brazil
Loss Contingencies [Line Items]
Value of tax credits disallowed	$ 1,000,000	R$ 3.4
Penalties, court costs, attorneys’ fees, and accrued interest	5,100,000	16.8
Tax liability related to the ICMS Tax Assessments, accrued	2,800,000	R$ 9.4
Inventory Purchase Commitments
Loss Contingencies [Line Items]
Non-cancelable purchase commitments	151,500,000
Software and Support Services Commitments
Loss Contingencies [Line Items]
Non-cancelable purchase commitments	$ 17,500,000

Income Taxes (Narratives) (Details) - USD ($)		3 Months Ended			6 Months Ended	9 Months Ended
Income Taxes (Narratives) (Details) - USD ($)	Dec. 22, 2017	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Operating Loss Carryforwards [Line Items]
Provision for income taxes		$ 1,729,000		$ 1,166,000		$ 1,787,000	$ 3,252,000
U.S. Federal tax rate		21.00%			35.00%
Tax provision offset by tax benefit						$ 2,500,000
Description of effective date of enacted tax rate implementation						Effective for tax years beginning on or after January 1, 2018.
Tax benefit			$ 2,500,000
Additional tax provision resulting corresponding reduction in valuation allowance		$ 0				$ 0
Unrecognized tax benefits		18,500,000				18,500,000
Unrecognized tax benefit future impact if recognized		18,500,000				18,500,000
Enterasys, Zebra WLAN Business and Campus Fabric Business
Operating Loss Carryforwards [Line Items]
Tax amortization deduction for capitalized goodwill		1,800,000				5,500,000
Deferred tax liability, goodwill		$ 5,300,000				$ 5,300,000
Amortization period for tax purposes						15 years
Fiscal 2018
Operating Loss Carryforwards [Line Items]
U.S. Federal tax rate	28.00%

Net Loss Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share Basic And Diluted [Abstract]
Net loss	$ (13,613)	$ (4,977)	$ (41,160)	$ (14,948)
Weighted-average shares used in per share calculation - basic and diluted	115,059	109,213	113,641	107,531
Net loss per share - basic and diluted	$ (0.12)	$ (0.05)	$ (0.36)	$ (0.14)

Net Loss Per Share (Schedule of Anti-Dilutive Shares Excluded from Earnings Per Share Calculation) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of EPS	11,564	273	11,420	674
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of EPS	2,379		2,649	398
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of EPS	8,213	4	7,670	7
Employee Stock Purchase Plan shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of EPS	972	269	1,101	269

Foreign Exchange Forward Contracts (Narratives) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Derivative [Line Items]
Foreign currency transaction realized gain (loss)	$ (300,000)	$ 800,000	$ (1,500,000)
Maximum
Derivative [Line Items]
Foreign currency transaction realized gain (loss)				$ 100,000
Not Designated as Hedging Instrument \| Forward Foreign Currency Contracts
Derivative [Line Items]
Notional principal amount of forward foreign currency contracts	$ 6,700,000		$ 6,700,000
Maximum maturities for contracts			90 days
Derivative instruments outstanding		$ 0		$ 0

Disclosure about Segments of an Enterprise and Geographic Areas (Narratives) (Details)	9 Months Ended
	Mar. 31, 2018 Segment Geographic_Area
Segment Reporting [Abstract]
Number of operating segments \| Segment	1
Number of geographic regions \| Geographic_Area	3

Disclosure about Segments of an Enterprise and Geographic Areas (Schedule of Revenues by Geographic Regions and Channels) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Total net revenues	$ 262,004	$ 149,196	$ 704,842	$ 428,177
Distributor
Segment Reporting Information [Line Items]
Total net revenues	142,433	68,020	372,168	208,728
Direct
Segment Reporting Information [Line Items]
Total net revenues	119,571	81,176	332,674	219,449
United States
Segment Reporting Information [Line Items]
Total net revenues	133,321	79,339	341,899	210,618
United States \| Distributor
Segment Reporting Information [Line Items]
Total net revenues	76,392	31,972	181,415	98,026
United States \| Direct
Segment Reporting Information [Line Items]
Total net revenues	56,929	47,367	160,484	112,592
Other Americas
Segment Reporting Information [Line Items]
Total net revenues	10,453	3,460	33,669	20,551
Other Americas \| Distributor
Segment Reporting Information [Line Items]
Total net revenues	4,288	1,559	13,417	5,779
Other Americas \| Direct
Segment Reporting Information [Line Items]
Total net revenues	6,165	1,901	20,252	14,772
Total Americas
Segment Reporting Information [Line Items]
Total net revenues	143,774	82,799	375,568	231,169
Total Americas \| Distributor
Segment Reporting Information [Line Items]
Total net revenues	80,680	33,531	194,832	103,805
Total Americas \| Direct
Segment Reporting Information [Line Items]
Total net revenues	63,094	49,268	180,736	127,364
EMEA
Segment Reporting Information [Line Items]
Total net revenues	94,788	52,226	263,503	160,485
EMEA \| Distributor
Segment Reporting Information [Line Items]
Total net revenues	58,668	32,090	165,856	99,459
EMEA \| Direct
Segment Reporting Information [Line Items]
Total net revenues	36,120	20,136	97,647	61,026
APAC
Segment Reporting Information [Line Items]
Total net revenues	23,442	14,171	65,771	36,523
APAC \| Distributor
Segment Reporting Information [Line Items]
Total net revenues	3,085	2,399	11,480	5,464
APAC \| Direct
Segment Reporting Information [Line Items]
Total net revenues	$ 20,357	$ 11,772	$ 54,291	$ 31,059

Disclosure about Segments of an Enterprise and Geographic Areas (Schedule of Long Lived Assets by Segment) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Total long-lived assets	$ 215,241	$ 80,642
Americas
Segment Reporting Information [Line Items]
Total long-lived assets	189,321	67,369
EMEA
Segment Reporting Information [Line Items]
Total long-lived assets	15,586	8,998
APAC
Segment Reporting Information [Line Items]
Total long-lived assets	$ 10,334	$ 4,275

Subsequent Event (Narratives) (Details) - USD ($) $ in Millions		9 Months Ended
	May 01, 2018	Mar. 31, 2018
Revolving Facility \| Minimum
Subsequent Event [Line Items]
Commitment fee on quarterly basis		0.375%
Revolving Facility \| Maximum
Subsequent Event [Line Items]
Commitment fee on quarterly basis		0.50%
Revolving Facility \| London Interbank Offered Rate (LIBOR)
Subsequent Event [Line Items]
Interest rate, applicable margin		3.25%
Revolving Facility \| Adjusted Base Rate
Subsequent Event [Line Items]
Interest rate, applicable margin		1.25%
Term Loan \| London Interbank Offered Rate (LIBOR)
Subsequent Event [Line Items]
Interest rate, applicable margin		3.25%
Term Loan \| Adjusted Base Rate
Subsequent Event [Line Items]
Interest rate, applicable margin		1.25%
Subsequent Event \| Second Amendment
Subsequent Event [Line Items]
Termination date	May 01, 2018
Subsequent Event \| New Credit Agreement
Subsequent Event [Line Items]
Commitment fee on quarterly basis	0.35%
Minimum fixed charge coverage ratio	125.00%
Maximum leverage ratio during fiscal quarters ending March 31, 2018 through September 30, 2019	300.00%
Maximum leverage ratio during fiscal quarters ending December 31, 2019 through March 31, 2021	275.00%
Maximum leverage ratio during fiscal quarters ending June 30, 2021 and thereafter	250.00%
Subsequent Event \| New Credit Agreement \| Minimum
Subsequent Event [Line Items]
Commitment fee on quarterly basis	0.25%
Subsequent Event \| New Credit Agreement \| Maximum
Subsequent Event [Line Items]
Commitment fee on quarterly basis	0.40%
Subsequent Event \| New Credit Agreement \| London Interbank Offered Rate (LIBOR) \| Minimum
Subsequent Event [Line Items]
Interest rate, applicable margin	1.50%
Subsequent Event \| New Credit Agreement \| London Interbank Offered Rate (LIBOR) \| Maximum
Subsequent Event [Line Items]
Interest rate, applicable margin	2.75%
Subsequent Event \| New Credit Agreement \| Adjusted Base Rate \| Minimum
Subsequent Event [Line Items]
Interest rate, applicable margin	0.50%
Subsequent Event \| New Credit Agreement \| Adjusted Base Rate \| Maximum
Subsequent Event [Line Items]
Interest rate, applicable margin	1.75%
Subsequent Event \| New Credit Agreement \| Revolving Facility
Subsequent Event [Line Items]
Borrowing capacity from Credit Agreement	$ 40
Credit Facility, as amended term	5 years
Subsequent Event \| New Credit Agreement \| Term Loan
Subsequent Event [Line Items]
Borrowing capacity from Credit Agreement	$ 190
Credit Facility, as amended term	5 years
Subsequent Event \| New Credit Agreement \| New Senior Secured Credit Facilities
Subsequent Event [Line Items]
Credit facility, borrowed amount	$ 200