Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Dec. 31, 2017	Feb. 02, 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	Dec. 31, 2017
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Trading Symbol	EXTR
Amendment Flag	false
Entity Common Stock, Shares Outstanding		115,267,499

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Current assets:
Cash and cash equivalents	$ 127,108	$ 130,450
Accounts receivable, net of allowance for doubtful accounts of $1,382 at December 31, 2017 and $1,190 at June 30, 2017	154,906	93,115
Inventories	83,377	47,410
Prepaid expenses and other current assets	24,772	27,867
Total current assets	390,163	298,842
Property and equipment, net	68,565	30,240
Intangible assets, net	92,925	25,337
Goodwill	130,988	80,216
Other assets	44,267	25,065
Total assets	726,908	459,700
Current liabilities:
Current portion of long-term debt	22,426	12,280
Accounts payable	73,553	31,587
Accrued compensation and benefits	49,104	42,662
Accrued warranty	13,010	10,584
Deferred revenue	113,664	79,048
Other accrued liabilities	74,517	37,044
Total current liabilities	346,274	213,205
Deferred revenue, less current portion	38,693	25,293
Long-term debt, less current portion	160,712	80,422
Deferred income taxes	5,163	6,576
Other long-term liabilities	64,347	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; 113,931,341 shares issued and outstanding at December 30, 2017 and 110,924,508 shares issued and outstanding at June 30, 2017	114	111
Additional paid-in-capital	921,716	909,155
Accumulated other comprehensive loss	(1,278)	(2,302)
Accumulated deficit	(808,833)	(781,286)
Total stockholders’ equity	111,719	125,678
Total liabilities and stockholders’ equity	$ 726,908	$ 459,700

Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Current assets:
Allowance for doubtful accounts	$ 1,382	$ 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	113,931,341	110,924,508
Common stock, shares outstanding	113,931,341	110,924,508

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Net revenues:
Product	$ 174,850	$ 118,055	$ 339,624	$ 208,148
Service	56,273	38,322	103,214	70,833
Total net revenues	231,123	156,377	442,838	278,981
Cost of revenues:
Product	78,472	62,627	158,517	106,876
Service	23,665	14,098	42,954	26,567
Total cost of revenues	102,137	76,725	201,471	133,443
Gross profit:
Product	96,378	55,428	181,107	101,272
Service	32,608	24,224	60,260	44,266
Total gross profit	128,986	79,652	241,367	145,538
Operating expenses:
Research and development	45,907	24,013	80,192	42,312
Sales and marketing	65,659	41,025	121,220	77,884
General and administrative	11,669	9,397	23,854	17,684
Acquisition and integration costs, net of bargain purchase gain	34,115	4,169	38,359	6,490
Restructuring and related charges, net of reversals		1,853		1,853
Amortization of intangibles	2,746	2,175	4,360	6,317
Total operating expenses	160,096	82,632	267,985	152,540
Operating loss	(31,110)	(2,980)	(26,618)	(7,002)
Interest income	717	81	1,364	138
Interest expense	(2,504)	(1,176)	(4,719)	(1,823)
Other income (expense), net	(643)	1,025	2,484	802
Loss before income taxes	(33,540)	(3,050)	(27,489)	(7,885)
Provision (benefit) for income taxes	(1,617)	1,179	58	2,086
Net loss	$ (31,923)	$ (4,229)	$ (27,547)	$ (9,971)
Basic and diluted net loss per share:
Net loss per share - basic	$ (0.28)	$ (0.04)	$ (0.24)	$ (0.09)
Net loss per share - diluted	$ (0.28)	$ (0.04)	$ (0.24)	$ (0.09)
Shares used in per share calculation - basic	113,621	107,425	112,931	106,690
Shares used in per share calculation - diluted	113,621	107,425	112,931	106,690

Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net loss:	$ (31,923)	$ (4,229)	$ (27,547)	$ (9,971)
Available for sale securities:
Change in unrealized gains on available for sale securities	54		237
Net change in foreign currency translation adjustments	432	(421)	787	(974)
Other comprehensive income (loss), net of tax:	486	(421)	1,024	(974)
Total comprehensive loss	$ (31,437)	$ (4,650)	$ (26,523)	$ (10,945)

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net loss	$ (27,547)	$ (9,971)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	8,093	4,832
Amortization of intangible assets	11,023	11,593
Provision for doubtful accounts	1,180	154
Stock-based compensation	11,828	6,856
Deferred income taxes	(2,135)	923
Non-cash restructuring and related charges		1,718
Realized gain on sale of non-marketable equity investment	(3,757)
Realized gain on bargain purchase	(4,920)
Other non-cash items	1,818	(243)
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed
Accounts receivable	(11,188)	(7,756)
Inventories	(449)	4,313
Prepaid expenses and other assets	1,188	6,823
Accounts payable	17,547	(4,444)
Accrued compensation and benefits	3,734	(916)
Deferred revenue	4,446	(2,469)
Other current and long-term liabilities	3,387	7,875
Net cash provided by operating activities	14,248	19,288
Cash flows from investing activities:
Capital expenditures	(13,309)	(4,662)
Acquisitions	(97,581)	(51,088)
Proceeds from sale of non-marketable equity investment	4,922
Net cash used in investing activities	(105,968)	(55,750)
Cash flows from financing activities:
Borrowings under Term Loan	100,000	48,250
Repayments of debt	(8,686)	(5,513)
Loan fees on borrowings	(1,494)	(1,327)
Proceeds from issuance of common stock, net of tax withholding	(1,536)	4,831
Net cash provided by financing activities	88,284	46,241
Foreign currency effect on cash	94	(115)
Net (decrease) increase in cash and cash equivalents	(3,342)	9,664
Cash and cash equivalents at beginning of period	130,450	94,122
Cash and cash equivalents at end of period	$ 127,108	$ 103,786

Description of Business and Basis of Presentation

6 Months Ended

Dec. 31, 2017

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 December 31, 2017. The results of operations for the three and six months ended December 31, 2017 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. 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 ending 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 and income taxes. Actual results could differ from these estimates.

Reclassification

Certain amounts from prior years have been reclassified to conform to the current year’s presentation in the accompanying condensed consolidated statements of cash flow. The reclassification had no impact on previously reported net loss or accumulated deficit.

Business Combinations

6 Months Ended

Dec. 31, 2017

Business Combinations [Abstract]

Business Combinations

2. Business Combinations

The Company completed three acquisitions during the six months ended December 31, 2017. 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 is pending the finalization of valuations, 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

On October 27, 2017 (the “Brocade Closing”), the Company completed its acquisition of the data center business (the “Data Center Business”) of Brocade Communication Systems, Inc.’s (“Brocade”), pursuant to an Asset Purchase Agreement (the “Brocade APA”) dated as of October 3, 2017, by and between the Company and Brocade. Under the terms and conditions of the Brocade 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 Brocade 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 Brocade 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 Brocade 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 October 27, 2017 of the tangible and identifiable intangible assets acquired and liabilities assumed:

	Preliminary Allocation as of October 27, 2017
Accounts receivables	$	33,488
Inventories		19,973
Prepaid expenses and other current assets		988
Property and equipment		29,160
Other assets		4,734
Accounts payable and accrued expenses		(15,850	)
Deferred revenue		(33,519	)
Net tangible assets acquired		38,974
Identifiable intangible assets		28,600
Goodwill		16,763
Total intangible assets acquired		45,363
Total net assets acquired	$	84,337

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

Intangible Assets	Estimated Useful Life (in years)		Amount
Developed technology	2 - 5		$	21,800
Customer relationships		5		5,400
Trade names		4		1,400
Total identifiable intangible assets			$	28,600

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 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 six months ended December 31, 2017 the Company incurred $32.5 million and $33.8 million, respectively, of acquisition and integration related expenses associated with the acquisition of the Data Center Business, including a $25.0 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 and companies.

Campus Fabric Business

On July 14, 2017, (the “Avaya Closing Date”) the Company completed its acquisition of Avaya Inc.’s. (“Avaya”) fabric-based secure networking solutions and network security solutions business (the “Campus Fabric Business”) that had been announced on March 7, 2017. Upon the terms and subject to the conditions of the Asset Purchase Agreement (the “Avaya 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 Avaya 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 Avaya Closing Date. As a condition of the Avaya APA, the Company had made deposits of $10.2 million in the third quarter of fiscal 2017, which were applied to the purchase price upon the Avaya Closing Date.

The following table below summarizes the preliminary allocation as of December 31, 2017 of the tangible and identifiable intangible assets acquired and liabilities assumed:

	Preliminary Allocation as of September 30, 2017			Change during three months ended December 31, 2017				Preliminary Allocation as of December 31, 2017
Accounts receivables	$	18,112		$	183		(a)	$	18,295
Inventories		16,605			(1,060	)	(b)(c)		15,545
Prepaid expenses and other current assets		673			—				673
Property and equipment		3,768			—				3,768
Other assets		2,568			2,743		(c)		5,311
Accounts payable and accrued expenses		(29,716	)		(2,203	)	(d)(f)		(31,919	)
Deferred revenue		(10,214	)		163		(d)(e)		(10,051	)
Other long-term liabilities		(6,608	)		1,403		(f)		(5,205	)
Net tangible assets acquired		(4,812	)		1,229				(3,583	)
Identifiable intangible assets		44,000			2,900		(g)		46,900
In-process research and development		2,300			200		(g)		2,500
Goodwill		38,338			(4,329	)			34,009
Total intangible assets acquired		84,638			(1,229	)			83,409
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 receipts of product, c) a reclassification from inventories to other assets related to service parts, d) a reclassification from deferred revenue to accounts payable, e) an adjustment of the fair value of deferred maintenance revenue, f) a reclassification from long-term liabilities to short-term related to liabilities assumed, g) revised net realizable value based on usefulness 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 (in thousands, except years):

Intangible Assets	Estimated Useful Life (in years)		Amount
Developed technology		6	$	37,400
Customer relationships		4		5,100
Trademarks		5		2,600
Backlog		1		1,800
Total identifiable intangible assets			$	46,900

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 $2.5 million which represents the fair value of in-process research and development activities. Once the related research and development efforts are completed, the Company will determine whether the asset will continue to be an indefinite lived asset or become a finite lived asset and apply the appropriate accounting accordingly.

The results of operations of the Campus Fabric Business are included in the accompanying condensed consolidated results of operations beginning July 14, 2017. 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 six months ended December 31, 2017, the Company incurred $6.6 million and $9.5 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 $13.8 million, lease equipment of $3.5 million and identifiable intangible assets of $0.6 million, and the fair value of the contingent consideration was $12.9 million. As the preliminary fair value of the net assets acquired exceeded the fair value of the purchase consideration, the Company recorded a gain from the bargain purchase of $4.9 million in “Acquisition and integration costs, net of bargain purchase gain” in the accompanying condensed consolidated statements of operations for the second quarter of fiscal 2018. 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 the 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:

	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 six months ended December 31, 2017, combines the results for Extreme for the three and six months ended December 31, 2017, which include the results of the Data Center Business, CF Business and Campus Fabric Business subsequent to the acquisition date and their historical results up to the acquisition date.

The unaudited pro forma financial information for the three and six months ended December 31, 2016, combines the historical results for Extreme for those periods, as adjusted for the adoption of ASC 606, with the historical results of the Data Center Business, CF Business and Campus Fabric Business for the three and six months ended December 31, 2016, as well as the historical results of the WLAN Business up to the 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 six months ended December 31, 2016 or 2017 have not been adjusted for the adoption of ASC 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					Six Months Ended
	December 31, 2017		December 31, 2016			December 31, 2017			December 31, 2016
			(As adjusted)						(As adjusted)
Net revenues	$	252,532	$	311,503		$	537,040		$	644,435
Net income (loss)	$	1,152	$	(62,134	)	$	(7,622	)	$	(95,972	)
Net income (loss) per share - basic	$	0.01	$	(0.58	)	$	(0.07	)	$	(0.90	)
Net income (loss) per share - diluted	$	0.01	$	(0.58	)	$	(0.07	)	$	(0.90	)
Shares used in per share calculation - basic		113,621		107,425			112,931			106,690
Shares used in per share calculation - diluted		119,656		107,425			112,931			106,690

Summary of Significant Accounting Policies

6 Months Ended

Dec. 31, 2017

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 ASC 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 trailing twelve-month 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 ASC 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 consolidated statements of operations for the three-month and six-month periods ended December 31, 2017, and 2016 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 December 31, 2017, the Company had $152.4 million of remaining performance obligations, which is comprised of deferred maintenance revenue and services not yet delivered. The Company expects to recognize approximately 54 percent of its remaining performance obligations as revenue in fiscal 2018, an additional 31 percent by fiscal 2019 and 15 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 six-month periods ended December 31, 2017 and 2016, that was included in the deferred revenue balance at the beginning of each period was $53.1 million and $49.7 million respectively. Revenue recognized for the three-month periods ended December 31, 2017 and 2016, that was included in the deferred revenue balance at the beginning of each period was $36.9 million and $33.5 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 $3.0 million and $2.5 million at December 31, 2017 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-month period ended December 31, 2017 and 2016, was $0.5 million and $0.4 million, respectively. Amortization recognized during the six-month period ended December 31, 2017 and 2016, was $0.9 million and $0.7 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 billing addresses of its customers (in thousands, unaudited):

	Three Months Ended
	December 31, 2017						December 31, 2016
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	56,269	$	54,559	$	110,828	$	39,063	$	38,396	$	77,459
Other		1,155		5,698		6,853		2,827		3,243		6,070
Total Americas		57,424		60,257		117,681		41,890		41,639		83,529
EMEA:		55,956		33,624		89,580		36,070		24,361		60,431
APAC:		5,131		18,731		23,862		1,613		10,804		12,417
Total net revenues	$	118,511	$	112,612	$	231,123	$	79,573	$	76,804	$	156,377

	Six Months Ended
	December 31, 2017						December 31, 2016
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	98,661	$	105,549	$	204,210	$	66,054	$	65,225	$	131,279
Other		15,491		12,093		27,584		4,220		12,871		17,091
Total Americas		114,152		117,642		231,794		70,274		78,096		148,370
EMEA:		107,188		61,527		168,715		67,369		40,890		108,259
APAC:		8,395		33,934		42,329		3,065		19,287		22,352
Total net revenues	$	229,735	$	213,103	$	442,838	$	140,708	$	138,273	$	278,981

Recent Accounting Pronouncements

6 Months Ended

Dec. 31, 2017

Accounting Changes And Error Corrections [Abstract]

Recent Accounting Pronouncements

4.Recent Accounting Pronouncements

Recently Issued Accounting Pronouncements

In August 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (ASU) 2017-12, Derivatives and Hedging (Topic 815) – Targeted Improvements to Accounting for Hedging Activities (“ASU 2017-12”), 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 May 2017, the FASB issued ASU 2017-09, Compensation—Stock Compensation (Topic 718) - Scope of Modification Accounting (“ASU 2017-09”) 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 ASC 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 our financial statements. 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 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 2019.

In February 2016, the FASB issued ASU No. 2016-02 (Topic 842), Leases (“ASU 2016-02”) 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 ASU 2016-02, 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 ASU 2016-02 must be calculated using the applicable incremental borrowing rate at the date of adoption. In addition, ASU 2016-02 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

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 ASU 2014-09, 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, ASU 2014-09 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 ASU 2014-09, 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 ASU 2014-09 on our condensed consolidated financial statements as of June 30, 2017, and for the three and six months ended December 31, 2016. See Note 3. “Summary of Significant Accounting Policies” to our condensed consolidated financial statements for further discussion of the effects of the adoption of ASU 2014-09 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 ASU 2014-09 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 ASU 2014-09 on our condensed consolidated statements of operations (unaudited) for the three and six months ended December 31, 2016 (in thousands, except per share amounts):

	Three Months Ended December 31, 2016
	As Reported			Adjustment			As Adjusted
Net revenues
Product	$	109,789		$	8,266		$	118,055
Service		38,322			—			38,322
Total net revenues		148,111			8,266			156,377

Cost of revenues
Product		58,659			3,968			62,627
Service		14,098			—			14,098
Total cost of revenues		72,757			3,968			76,725

Gross profit
Product		51,130			4,298			55,428
Service		24,224			—			24,224
Total Gross profit		75,354			4,298			79,652

Sales and marketing expenses		41,109			(84	)		41,025
Operating loss		(7,362	)		4,382			(2,980	)
Net loss before tax		(7,432	)		4,382			(3,050	)
Net loss	$	(8,611	)	$	4,382		$	(4,229	)

Basic and diluted net loss per share
Net loss per share - basic	$	(0.08	)				$	(0.04	)
Net loss per share - diluted	$	(0.08	)				$	(0.04	)

Shares used in per share calculation - basic		107,425						107,425
Shares used in per share calculation - diluted		107,425						107,425

	Six Months Ended December 31, 2016
	As Reported			Adjustment			As Adjusted
Net revenues
Product	$	199,920		$	8,228		$	208,148
Service		70,833			—			70,833
Total net revenues		270,753			8,228			278,981

Cost of revenues
Product		103,586			3,290			106,876
Service		26,567			—			26,567
Total cost of revenues		130,153			3,290			133,443

Gross profit
Product		96,334			4,938			101,272
Service		44,266			—			44,266
Total Gross profit		140,600			4,938			145,538

Sales and marketing expenses		78,065			(181	)		77,884
Operating loss		(12,121	)		5,119			(7,002	)
Net loss before tax		(13,004	)		5,119			(7,885	)
Net loss	$	(15,090	)	$	5,119		$	(9,971	)

Basic and diluted net loss per share
Net loss per share - basic	$	(0.14	)				$	(0.09	)
Net loss per share - diluted	$	(0.14	)				$	(0.09	)

Shares used in per share calculation - basic		106,690						106,690
Shares used in per share calculation - diluted		106,690						106,690

The following tables present the effect of the adoption of ASU 2014-09 on our condensed consolidated statement of cash flows (unaudited) for the six months ended December 31, 2016 (in thousands):

	Six Months Ended December 31, 2016
	As Reported			Adjustment			As Adjusted
Cash flows from operating activities
Net loss	$	(15,090	)	$	5,119		$	(9,971	)
Changes in operating assets and liabilities, net
Accounts receivable		(18,737	)		10,981			(7,756	)
Inventories		6,004			(1,691	)		4,313
Prepaid and other assets		7,004			(181	)		6,823
Deferred distributors revenue, net of cost of sales to distributors		14,516			(14,516	)		—
Other current and long term liabilities		7,587			288			7,875
Net cash provided by operating activities		19,288			—			19,288
Cash flows from investing activities		(55,750	)		—			(55,750	)
Cash flows from financing activities		46,241			—			46,241
Foreign currency effect on cash		(115	)		—			(115	)
Net increase in cash and cash equivalents	$	9,664		$	—		$	9,664

Balance Sheet Accounts

6 Months Ended

Dec. 31, 2017

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):

	December 31, 2017		June 30, 2017
Cash	$	122,608	$	126,159
Cash equivalents		4,500		4,291
Total cash and cash equivalents		127,108		130,450
Marketable securities (consisting of available-for-sale securities)		1,104		—
Total cash, cash equivalents and marketable securities	$	128,212	$	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 original maturities are greater than three months, but less than one year at the balance sheet date. 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):

	December 31, 2017		June 30, 2017
			(As Adjusted)
Finished goods	$	67,244	$	46,620
Raw materials		16,133		790
Total Inventories	$	83,377	$	47,410

Property and Equipment, Net

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

	December 31, 2017			June 30, 2017
Computers and equipment	$	63,539		$	34,716
Purchased software		16,329			11,785
Office equipment, furniture and fixtures		17,272			10,852
Leasehold improvements		29,319			23,046
Total property and equipment		126,459			80,399
Less: accumulated depreciation and amortization		(57,894	)		(50,159	)
Property and equipment, net	$	68,565		$	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
December 31, 2017
Developed technology	4.5 years	$	116,000	$	48,334	$	67,666
Customer relationships	3.9 years		51,410		38,674		12,736
Maintenance contracts	0.8 years		17,000		14,166		2,834
Trademarks	3.9 years		9,100		3,411		5,689
Backlogs	— years		1,800		1,800		—
License agreements	6.1 years		2,445		1,255		1,190
Other intangibles	2.2 years		1,382		1,072		310
Total intangibles, net with finite lives			199,137		108,712		90,425
In-process research and development, with indefinite life			2,500		—		2,500
Total intangibles, net		$	201,637	$	108,712	$	92,925

	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
Trademarks	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 six months ended December 31, 2017, in-process research and development of $1.4 million 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				Six Months Ended
	December 31, 2017		December 31, 2016		December 31, 2017		December 31, 2016
Amortization in “Cost of revenues: Product”	$	3,866	$	1,720	$	6,663	$	5,276
Amortization of intangibles		2,746		2,175		4,360		6,317
Total amortization	$	6,612	$	3,895	$	11,023	$	11,593

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):

	December 31, 2017
Balance as of June 30, 2017	$	80,216
Additions due to acquisitions		50,772
Balance at end of period	$	130,988

During the six months ended December 31, 2017, the Company completed acquisitions of the Campus Fabric Business and the Data Center Business, resulting in an additional goodwill of $34.0 million and $16.8 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 deferred revenue for professional and training services.

Debt

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

	December 31, 2017			June 30, 2017
Current portion of long-term debt:
Term Loan	$	22,964		$	12,444
Less: unamortized debt issuance costs		(538	)		(164	)
Current portion of long-term debt	$	22,426		$	12,280

Long-term debt, less current portion:
Term Loan	$	152,062		$	71,268
Revolver		10,000			10,000
Less: unamortized debt issuance costs		(1,350	)		(846	)
Total long-term debt, less current portion		160,712			80,422
Total debt	$	183,138		$	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, as amended”), 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, as amended. 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 Brocade Purchase Agreement (as defined above). On the Brocade 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 December 31, 2017.

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 six months ended December 31, 2017 and 2016 (in thousands):

	Three Months Ended						Six Months Ended
	December 31, 2017			December 31, 2016			December 31, 2017			December 31, 2016
				(As adjusted)						(As adjusted)
Balance beginning of period	$	13,499		$	9,017		$	10,584		$	9,998
Warranties assumed due to acquisition		526			2,034			3,682			2,034
New warranties issued		1,657			1,176			3,929			2,104
Warranty expenditures		(2,672	)		(1,437	)		(5,185	)		(3,346	)
Balance end of period	$	13,010		$	10,790		$	13,010		$	10,790

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):

	December 31, 2017		June 30, 2017
Acquisition related deferred payments, less current portion	$	15,037	$	—
Acquisition-related contingent consideration obligations, less current portion		36,130		—
Other		13,180		8,526
Total other accrued liabilities	$	64,347	$	8,526

Advertising

All advertising costs are expensed as incurred. Advertising expenses for three and six months ended December 31, 2017 and 2016, 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 revenue:

	Three Months Ended		Six Months Ended
	December 31, 2017	December 31, 2016	December 31, 2017	December 31, 2016
		(As adjusted)		(As adjusted)
Westcon Group Inc.	14%	12%	15%	12%
Tech Data Corporation	12%	15%	12%	16%
Jenne Corporation	*	13%	10%	14%
Avnet	*	*	*	10%

*Less than 10% of net revenue

The following customers account for more than 10% of the Company’s accounts receivable outstanding as of December 31, 2017, Westcon Group 24%, Tech Data 21% and Avnet 11%.

Fair Value Measurements

6 Months Ended

Dec. 31, 2017

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):

December 31, 2017	Level 1		Level 2		Level 3		Total
Assets
Investments:
Money market funds	$	4,500	$	—	$	—	$	4,500
Marketable securities		1,104		—		—		1,104
Total assets measured at fair value	$	5,604	$	—	$	—	$	5,604
Liabilities
Acquisition-related contingent consideration obligations	$	—	$	—	$	47,030	$	—
Total liabilities measured at fair value	$	—	$	—	$	47,030	$	—

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:

During the first quarter of fiscal 2018, pursuant to the sale of an investment in non-marketable equity securities, the Company received 41,685 shares of a company publicly traded on the London Stock Exchange. As of December 31, 2017, the shares received have a fair value of $1.1 million. (See below, Level 3 investments)

Level 2 investments:

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, as amended 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 $185.0 million and $93.7 million as of December 31, 2017 and June 30, 2017, respectively. Such amounts are immaterial for all periods presented.

Level 3 investments:

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 the third party’s 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 and $0.5 million of cash and shares, respectively, 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 statements of operations for the six months ended December 31, 2017. The 41,685 shares received and held as of December 31, 2017 were considered Level 1 investments as these have 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
	December 31, 2017
Beginning balance	$	—
Initial fair value measurements		47,030
Change in fair value		—
Ending balance	$	47,030

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

6 Months Ended

Dec. 31, 2017

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):

	December 31, 2017		June 30, 2017
2014 Employee Stock Purchase Plan		6,517		7,785
Employee stock options and awards outstanding		10,900		9,726
2013 Equity Incentive Plan shares available for grant		12,242		7,629
Total shares reserved for issuance		29,659		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				Six Months Ended
	December 31, 2017		December 31, 2016		December 31, 2017		December 31, 2016
Cost of product revenue	$	134	$	122	$	226	$	190
Cost of service revenue		296		186		429		418
Research and development		1,829		906		2,880		1,968
Sales and marketing		2,699		1,180		4,342		2,321
General and administrative		2,067		987		3,951		1,959
Total share-based compensation expense	$	7,025	$	3,381	$	11,828	$	6,856

During the six months ended December 31, 2017 or 2016, 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 six months ended December 31, 2017 (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		3,726			11.13
Vested		(1,871	)		3.78
Cancelled		(160	)		5.17
Non-vested stock awards outstanding at December 31, 2017		8,359		$	7.73	$	104,653

The following table summarizes stock option activity for the six months ended December 31, 2017(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		(517	)		4.42
Cancelled		(4	)		4.31
Options outstanding at December 31, 2017		2,541		$	3.99		3.28	$	21,687
Vested and expected to vest at December 31, 2017		2,541		$	3.99		3.28	$	21,687
Exercisable at December 31, 2017		2,126		$	4.24		3.08	$	17,599

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”). Once the FY18 Performance Threshold is satisfied the PSUs shall vest with respect to the number of RSUs granted on the same date that have vested as of the date the FY18 Performance Threshold is satisfied 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 months and six months ended December 31, 2017, none of the PSU grants referenced above achieved their FY18 Performance Threshold.

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 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 no shares granted under the ESPP during the three months ended December 31, 2017 or 2016. The weighted-average fair value of shares granted under the Company’s 2014 ESPP during the six months ended December 31, 2017 and 2016, was $2.41 and $1.00, respectively. There were 1,267,930 and 1,103,599 shares issued under the Company’s 2014 ESPP during the six months ended December 31, 2017 and 2016, respectively.

	Employee Stock Purchase Plan
	Six Month Ended
	December 31, 2017			December 31, 2016
Expected life	0.50 years			0.50 years
Risk-free interest rate		1.15	%		0.40	%
Volatility		42	%		40	%
Dividend yield		—	%		—	%

Restructuring Charges

6 Months Ended

Dec. 31, 2017

Restructuring And Related Activities [Abstract]

Restructuring Charges

8.	Restructuring Charges

No restructuring charges were recorded during the three or six months ended December 31, 2017.

For the three and six months ended December 31, 2016, the Company recorded $1.9 million in restructuring and other charges including accelerated depreciation of leasehold improvements and fixed assets in the amount of $1.7 million and adjustments to estimated sub-lease income to be received related to the estimated future obligations for non-cancelable lease payments for excess facilities of $0.1 million.

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.

In fiscal 2017, the Company announced a reduction-in-force (“RIF”). The Company recorded $5.6 million in severance and benefits charges, net during the year ended June 30, 2017. Cash payments of $2.2 million were paid during the first six months of fiscal 2018. The balance of cash payments for the RIF was immaterial as of December 31, 2017. The excess facilities payments will continue through fiscal year 2023.

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 payments		(397	)		(1,770	)		(73	)		(2,240	)
Balance as of December 31, 2017	$	1,787		$	83		$	12		$	1,882
Less: current portion included in other accrued liabilities											473
Restructuring accrual included in other long-term liabilities										$	1,409

Commitments and Contingencies

6 Months Ended

Dec. 31, 2017

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 December 31, 2017, the Company had non-cancelable commitments to purchase $145.3 million of such inventory. As of December 31, 2017 the Company had non-cancelable software and maintenance support commitments to purchase $19.0 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 December 31, 2017.

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 16.7 million (approximately U.S. $5.1 million), which includes penalties, court costs, attorneys’ fees, and accrued interest as of December 31, 2017. The Company believes the ICMS Tax Assessment against Enterasys Brasil is without merit, has appealed the lower court’s decision and has requested a stay of execution.

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. $2.9 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, putative 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. The Court held a hearing on Defendants’ motion to dismiss on December 14, 2017, and a ruling is expected in the next few months. 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. The parties have agreed to stay the case pending further activities in the securities class action litigation, and the court signed a stipulation and order to that effect.

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) sued 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 entered on October 23, 2017, the court scheduled a claim construction hearing for April 10, 2018, and ordered any trial of this matter to commence no earlier than March 19, 2019. 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

6 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Income Taxes

10.	Income Taxes

For the three months ended December 31, 2017 and 2016, the Company recorded income tax benefit of $1.6 million and income tax provision of $1.2 million, respectively. For the six months ended December 31, 2017 and 2016, the Company recorded income tax provision of $0.1 million and $2.1 million, respectively.

The income tax provisions for the three months ended December 31, 2017 and 2016, 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 tax provision for the three months ended December 31, 2017 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. The income tax provisions for both fiscal years were calculated based on the actual results of operations for the three months ended December 31, 2017 and 2016, and therefore may not reflect the annual effective tax rate.

The income tax provisions for the six months ended December 31, 2017 and 2016 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 six months ended December 31, 2017 is offset by the tax benefit of $2.5 million resulting from the U.S. Federal tax legislation referenced above.

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 three and six months ended December 31, 2017 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 taxes 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, Brazil and Japan. 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 six months ended December 31, 2017, the Company deducted $2.1 million and $3.7 million of tax amortization expense respectively, for each period related to capitalized goodwill resulting from these acquisitions. As of December 31, 2017, the Company recorded a deferred tax liability of $4.9 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 $19.0 million of unrecognized tax benefits as of December 31, 2017. The future impact of the unrecognized tax benefit of $18.9 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

6 Months Ended

Dec. 31, 2017

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						Six Months Ended
	December 31, 2017			December 31, 2016			December 31, 2017			December 31, 2016
				(As adjusted)						(As adjusted)
Net loss	$	(31,923	)	$	(4,229	)	$	(27,547	)	$	(9,971	)
Weighted-average shares used in per share calculation - basic and diluted		113,621			107,425			112,931			106,690
Net loss per share - basic and diluted	$	(0.28	)	$	(0.04	)	$	(0.24	)	$	(0.09	)

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				Six Months Ended
	December 31, 2017		December 31, 2016		December 31, 2017		December 31, 2016
Options to purchase common stock		2,622		2,301		2,781		2,762
Restricted stock units		7,950		28		7,162		79
Employee Stock Purchase Plan shares		834		330		906		330
Total shares excluded		11,406		2,659		10,849		3,171

Foreign Exchange Forward Contracts

6 Months Ended

Dec. 31, 2017

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 December 31, 2017, forward foreign currency contracts had a notional principal amount of $1.5 million and an immaterial unrealized gain. These contracts have maturities of less than 60 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 December 31, 2016, the Company did not have any derivative instruments outstanding.

Foreign currency transactions gains and losses from operations was loss of $0.6 million and gain of $1.1 million for the three months ended December 31, 2017 and 2016, respectively. Foreign currency transactions gains and losses from operations was loss of $1.1 million and gain of $0.8 million for the six months ended December 31, 2017 and 2016, respectively.

Disclosure about Segments of an Enterprise and Geographic Areas

6 Months Ended

Dec. 31, 2017

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
	December 31, 2017						December 31, 2016
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	56,269	$	54,559	$	110,828	$	39,063	$	38,396	$	77,459
Other		1,155		5,698		6,853		2,827		3,243		6,070
Total Americas		57,424		60,257		117,681		41,890		41,639		83,529
EMEA:		55,956		33,624		89,580		36,070		24,361		60,431
APAC:		5,131		18,731		23,862		1,613		10,804		12,417
Total net revenues	$	118,511	$	112,612	$	231,123	$	79,573	$	76,804	$	156,377

	Six Months Ended
	December 31, 2017						December 31, 2016
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	98,661	$	105,549	$	204,210	$	66,054	$	65,225	$	131,279
Other		15,491		12,093		27,584		4,220		12,871		17,091
Total Americas		114,152		117,642		231,794		70,274		78,096		148,370
EMEA:		107,188		61,527		168,715		67,369		40,890		108,259
APAC:		8,395		33,934		42,329		3,065		19,287		22,352
Total net revenues	$	229,735	$	213,103	$	442,838	$	140,708	$	138,273	$	278,981

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

Long Lived Assets	December 31, 2017		June 30, 2017
			(As adjusted)
Americas	$	187,617	$	67,369
EMEA		10,066		8,998
APAC		8,075		4,275
Total long lived assets	$	205,758	$	80,642

Subsequent Event	6 Months Ended
Subsequent Event	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Event	14.Subsequent Event On January 31, 2018, the Company approved and on February 2, 2018 began executing a reduction-in-force (the “Plan”) 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 Plan is expected to reduce the overall costs of the Company and to accelerate the achievement of the Company’s operating margin target objectives. The Company expects to incur charges of approximately $4.0 million in connection with the Plan. Upon completion of the Plan, the potential savings expected to be achieved as a result of reduced employee related expenses and lower operating costs will yield annualized savings of $7.0 - $9.0 million. The costs associated with this Plan primarily include employee severance and benefits expenses. The amount and timing of the actual charges may vary due to required consultation activities with certain employees as well as compliance with statutory severance requirements in local jurisdictions.

Summary of Significant Accounting Policies (Policies)

6 Months Ended

Dec. 31, 2017

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

Reclassification

Revenue Recognition

	Three Months Ended
	December 31, 2017						December 31, 2016
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	56,269	$	54,559	$	110,828	$	39,063	$	38,396	$	77,459
Other		1,155		5,698		6,853		2,827		3,243		6,070
Total Americas		57,424		60,257		117,681		41,890		41,639		83,529
EMEA:		55,956		33,624		89,580		36,070		24,361		60,431
APAC:		5,131		18,731		23,862		1,613		10,804		12,417
Total net revenues	$	118,511	$	112,612	$	231,123	$	79,573	$	76,804	$	156,377

	Six Months Ended
	December 31, 2017						December 31, 2016
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	98,661	$	105,549	$	204,210	$	66,054	$	65,225	$	131,279
Other		15,491		12,093		27,584		4,220		12,871		17,091
Total Americas		114,152		117,642		231,794		70,274		78,096		148,370
EMEA:		107,188		61,527		168,715		67,369		40,890		108,259
APAC:		8,395		33,934		42,329		3,065		19,287		22,352
Total net revenues	$	229,735	$	213,103	$	442,838	$	140,708	$	138,273	$	278,981

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.

Cash, Cash Equivalents and Marketable Securities

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

	December 31, 2017		June 30, 2017
Cash	$	122,608	$	126,159
Cash equivalents		4,500		4,291
Total cash and cash equivalents		127,108		130,450
Marketable securities (consisting of available-for-sale securities)		1,104		—
Total cash, cash equivalents and marketable securities	$	128,212	$	130,450

Inventories

Inventories consist of the following (in thousands):

	December 31, 2017		June 30, 2017
			(As Adjusted)
Finished goods	$	67,244	$	46,620
Raw materials		16,133		790
Total Inventories	$	83,377	$	47,410

Property and Equipment, Net

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

	December 31, 2017			June 30, 2017
Computers and equipment	$	63,539		$	34,716
Purchased software		16,329			11,785
Office equipment, furniture and fixtures		17,272			10,852
Leasehold improvements		29,319			23,046
Total property and equipment		126,459			80,399
Less: accumulated depreciation and amortization		(57,894	)		(50,159	)
Property and equipment, net	$	68,565		$	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
December 31, 2017
Developed technology	4.5 years	$	116,000	$	48,334	$	67,666
Customer relationships	3.9 years		51,410		38,674		12,736
Maintenance contracts	0.8 years		17,000		14,166		2,834
Trademarks	3.9 years		9,100		3,411		5,689
Backlogs	— years		1,800		1,800		—
License agreements	6.1 years		2,445		1,255		1,190
Other intangibles	2.2 years		1,382		1,072		310
Total intangibles, net with finite lives			199,137		108,712		90,425
In-process research and development, with indefinite life			2,500		—		2,500
Total intangibles, net		$	201,637	$	108,712	$	92,925

	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
Trademarks	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				Six Months Ended
	December 31, 2017		December 31, 2016		December 31, 2017		December 31, 2016
Amortization in “Cost of revenues: Product”	$	3,866	$	1,720	$	6,663	$	5,276
Amortization of intangibles		2,746		2,175		4,360		6,317
Total amortization	$	6,612	$	3,895	$	11,023	$	11,593

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):

	December 31, 2017
Balance as of June 30, 2017	$	80,216
Additions due to acquisitions		50,772
Balance at end of period	$	130,988

Deferred Revenue

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

Debt

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

	December 31, 2017			June 30, 2017
Current portion of long-term debt:
Term Loan	$	22,964		$	12,444
Less: unamortized debt issuance costs		(538	)		(164	)
Current portion of long-term debt	$	22,426		$	12,280

Long-term debt, less current portion:
Term Loan	$	152,062		$	71,268
Revolver		10,000			10,000
Less: unamortized debt issuance costs		(1,350	)		(846	)
Total long-term debt, less current portion		160,712			80,422
Total debt	$	183,138		$	92,702

The Company had $1.2 million of outstanding letters of credit and $48.8 million of availability under the Revolver as of December 31, 2017.

Guarantees and Product Warranties

	Three Months Ended						Six Months Ended
	December 31, 2017			December 31, 2016			December 31, 2017			December 31, 2016
				(As adjusted)						(As adjusted)
Balance beginning of period	$	13,499		$	9,017		$	10,584		$	9,998
Warranties assumed due to acquisition		526			2,034			3,682			2,034
New warranties issued		1,657			1,176			3,929			2,104
Warranty expenditures		(2,672	)		(1,437	)		(5,185	)		(3,346	)
Balance end of period	$	13,010		$	10,790		$	13,010		$	10,790

Other Long-term Liabilities

Other long-term liabilities

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

	December 31, 2017		June 30, 2017
Acquisition related deferred payments, less current portion	$	15,037	$	—
Acquisition-related contingent consideration obligations, less current portion		36,130		—
Other		13,180		8,526
Total other accrued liabilities	$	64,347	$	8,526

Advertising

All advertising costs are expensed as incurred. Advertising expenses for three and six months ended December 31, 2017 and 2016, 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 revenue:

	Three Months Ended		Six Months Ended
	December 31, 2017	December 31, 2016	December 31, 2017	December 31, 2016
		(As adjusted)		(As adjusted)
Westcon Group Inc.	14%	12%	15%	12%
Tech Data Corporation	12%	15%	12%	16%
Jenne Corporation	*	13%	10%	14%
Avnet	*	*	*	10%

*Less than 10% of net revenue

The following customers account for more than 10% of the Company’s accounts receivable outstanding as of December 31, 2017, Westcon Group 24%, Tech Data 21% and Avnet 11%.

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)

6 Months Ended

Dec. 31, 2017

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					Six Months Ended
	December 31, 2017		December 31, 2016			December 31, 2017			December 31, 2016
			(As adjusted)						(As adjusted)
Net revenues	$	252,532	$	311,503		$	537,040		$	644,435
Net income (loss)	$	1,152	$	(62,134	)	$	(7,622	)	$	(95,972	)
Net income (loss) per share - basic	$	0.01	$	(0.58	)	$	(0.07	)	$	(0.90	)
Net income (loss) per share - diluted	$	0.01	$	(0.58	)	$	(0.07	)	$	(0.90	)
Shares used in per share calculation - basic		113,621		107,425			112,931			106,690
Shares used in per share calculation - diluted		119,656		107,425			112,931			106,690

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 October 27, 2017 of the tangible and identifiable intangible assets acquired and liabilities assumed:

	Preliminary Allocation as of October 27, 2017
Accounts receivables	$	33,488
Inventories		19,973
Prepaid expenses and other current assets		988
Property and equipment		29,160
Other assets		4,734
Accounts payable and accrued expenses		(15,850	)
Deferred revenue		(33,519	)
Net tangible assets acquired		38,974
Identifiable intangible assets		28,600
Goodwill		16,763
Total intangible assets acquired		45,363
Total net assets acquired	$	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 (in thousands, except years):

Intangible Assets	Estimated Useful Life (in years)		Amount
Developed technology	2 - 5		$	21,800
Customer relationships		5		5,400
Trade names		4		1,400
Total identifiable intangible assets			$	28,600

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 December 31, 2017 of the tangible and identifiable intangible assets acquired and liabilities assumed:

	Preliminary Allocation as of September 30, 2017			Change during three months ended December 31, 2017				Preliminary Allocation as of December 31, 2017
Accounts receivables	$	18,112		$	183		(a)	$	18,295
Inventories		16,605			(1,060	)	(b)(c)		15,545
Prepaid expenses and other current assets		673			—				673
Property and equipment		3,768			—				3,768
Other assets		2,568			2,743		(c)		5,311
Accounts payable and accrued expenses		(29,716	)		(2,203	)	(d)(f)		(31,919	)
Deferred revenue		(10,214	)		163		(d)(e)		(10,051	)
Other long-term liabilities		(6,608	)		1,403		(f)		(5,205	)
Net tangible assets acquired		(4,812	)		1,229				(3,583	)
Identifiable intangible assets		44,000			2,900		(g)		46,900
In-process research and development		2,300			200		(g)		2,500
Goodwill		38,338			(4,329	)			34,009
Total intangible assets acquired		84,638			(1,229	)			83,409
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 (in thousands, except years):

Intangible Assets	Estimated Useful Life (in years)		Amount
Developed technology		6	$	37,400
Customer relationships		4		5,100
Trademarks		5		2,600
Backlog		1		1,800
Total identifiable intangible assets			$	46,900

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)

6 Months Ended

Dec. 31, 2017

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 billing addresses of its customers (in thousands, unaudited):

	Three Months Ended
	December 31, 2017						December 31, 2016
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	56,269	$	54,559	$	110,828	$	39,063	$	38,396	$	77,459
Other		1,155		5,698		6,853		2,827		3,243		6,070
Total Americas		57,424		60,257		117,681		41,890		41,639		83,529
EMEA:		55,956		33,624		89,580		36,070		24,361		60,431
APAC:		5,131		18,731		23,862		1,613		10,804		12,417
Total net revenues	$	118,511	$	112,612	$	231,123	$	79,573	$	76,804	$	156,377

	Six Months Ended
	December 31, 2017						December 31, 2016
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	98,661	$	105,549	$	204,210	$	66,054	$	65,225	$	131,279
Other		15,491		12,093		27,584		4,220		12,871		17,091
Total Americas		114,152		117,642		231,794		70,274		78,096		148,370
EMEA:		107,188		61,527		168,715		67,369		40,890		108,259
APAC:		8,395		33,934		42,329		3,065		19,287		22,352
Total net revenues	$	229,735	$	213,103	$	442,838	$	140,708	$	138,273	$	278,981

Recent Accounting Pronouncements (Tables)

6 Months Ended

Dec. 31, 2017

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 ASU 2014-09 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 December 31, 2016
	As Reported			Adjustment			As Adjusted
Net revenues
Product	$	109,789		$	8,266		$	118,055
Service		38,322			—			38,322
Total net revenues		148,111			8,266			156,377

Cost of revenues
Product		58,659			3,968			62,627
Service		14,098			—			14,098
Total cost of revenues		72,757			3,968			76,725

Gross profit
Product		51,130			4,298			55,428
Service		24,224			—			24,224
Total Gross profit		75,354			4,298			79,652

Sales and marketing expenses		41,109			(84	)		41,025
Operating loss		(7,362	)		4,382			(2,980	)
Net loss before tax		(7,432	)		4,382			(3,050	)
Net loss	$	(8,611	)	$	4,382		$	(4,229	)

Basic and diluted net loss per share
Net loss per share - basic	$	(0.08	)				$	(0.04	)
Net loss per share - diluted	$	(0.08	)				$	(0.04	)

Shares used in per share calculation - basic		107,425						107,425
Shares used in per share calculation - diluted		107,425						107,425

	Six Months Ended December 31, 2016
	As Reported			Adjustment			As Adjusted
Net revenues
Product	$	199,920		$	8,228		$	208,148
Service		70,833			—			70,833
Total net revenues		270,753			8,228			278,981

Cost of revenues
Product		103,586			3,290			106,876
Service		26,567			—			26,567
Total cost of revenues		130,153			3,290			133,443

Gross profit
Product		96,334			4,938			101,272
Service		44,266			—			44,266
Total Gross profit		140,600			4,938			145,538

Sales and marketing expenses		78,065			(181	)		77,884
Operating loss		(12,121	)		5,119			(7,002	)
Net loss before tax		(13,004	)		5,119			(7,885	)
Net loss	$	(15,090	)	$	5,119		$	(9,971	)

Basic and diluted net loss per share
Net loss per share - basic	$	(0.14	)				$	(0.09	)
Net loss per share - diluted	$	(0.14	)				$	(0.09	)

Shares used in per share calculation - basic		106,690						106,690
Shares used in per share calculation - diluted		106,690						106,690

The following tables present the effect of the adoption of ASU 2014-09 on our condensed consolidated statement of cash flows (unaudited) for the six months ended December 31, 2016 (in thousands):

	Six Months Ended December 31, 2016
	As Reported			Adjustment			As Adjusted
Cash flows from operating activities
Net loss	$	(15,090	)	$	5,119		$	(9,971	)
Changes in operating assets and liabilities, net
Accounts receivable		(18,737	)		10,981			(7,756	)
Inventories		6,004			(1,691	)		4,313
Prepaid and other assets		7,004			(181	)		6,823
Deferred distributors revenue, net of cost of sales to distributors		14,516			(14,516	)		—
Other current and long term liabilities		7,587			288			7,875
Net cash provided by operating activities		19,288			—			19,288
Cash flows from investing activities		(55,750	)		—			(55,750	)
Cash flows from financing activities		46,241			—			46,241
Foreign currency effect on cash		(115	)		—			(115	)
Net increase in cash and cash equivalents	$	9,664		$	—		$	9,664

Balance Sheet Accounts (Tables)

6 Months Ended

Dec. 31, 2017

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):

	December 31, 2017		June 30, 2017
Cash	$	122,608	$	126,159
Cash equivalents		4,500		4,291
Total cash and cash equivalents		127,108		130,450
Marketable securities (consisting of available-for-sale securities)		1,104		—
Total cash, cash equivalents and marketable securities	$	128,212	$	130,450

Components of Inventories

Inventories consist of the following (in thousands):

	December 31, 2017		June 30, 2017
			(As Adjusted)
Finished goods	$	67,244	$	46,620
Raw materials		16,133		790
Total Inventories	$	83,377	$	47,410

Components of Property and Equipment

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

	December 31, 2017			June 30, 2017
Computers and equipment	$	63,539		$	34,716
Purchased software		16,329			11,785
Office equipment, furniture and fixtures		17,272			10,852
Leasehold improvements		29,319			23,046
Total property and equipment		126,459			80,399
Less: accumulated depreciation and amortization		(57,894	)		(50,159	)
Property and equipment, net	$	68,565		$	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
December 31, 2017
Developed technology	4.5 years	$	116,000	$	48,334	$	67,666
Customer relationships	3.9 years		51,410		38,674		12,736
Maintenance contracts	0.8 years		17,000		14,166		2,834
Trademarks	3.9 years		9,100		3,411		5,689
Backlogs	— years		1,800		1,800		—
License agreements	6.1 years		2,445		1,255		1,190
Other intangibles	2.2 years		1,382		1,072		310
Total intangibles, net with finite lives			199,137		108,712		90,425
In-process research and development, with indefinite life			2,500		—		2,500
Total intangibles, net		$	201,637	$	108,712	$	92,925

	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
Trademarks	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				Six Months Ended
	December 31, 2017		December 31, 2016		December 31, 2017		December 31, 2016
Amortization in “Cost of revenues: Product”	$	3,866	$	1,720	$	6,663	$	5,276
Amortization of intangibles		2,746		2,175		4,360		6,317
Total amortization	$	6,612	$	3,895	$	11,023	$	11,593

Summary of Goodwill

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

	December 31, 2017
Balance as of June 30, 2017	$	80,216
Additions due to acquisitions		50,772
Balance at end of period	$	130,988

Components of Debt

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

	December 31, 2017			June 30, 2017
Current portion of long-term debt:
Term Loan	$	22,964		$	12,444
Less: unamortized debt issuance costs		(538	)		(164	)
Current portion of long-term debt	$	22,426		$	12,280

Long-term debt, less current portion:
Term Loan	$	152,062		$	71,268
Revolver		10,000			10,000
Less: unamortized debt issuance costs		(1,350	)		(846	)
Total long-term debt, less current portion		160,712			80,422
Total debt	$	183,138		$	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 six months ended December 31, 2017 and 2016 (in thousands):

	Three Months Ended						Six Months Ended
	December 31, 2017			December 31, 2016			December 31, 2017			December 31, 2016
				(As adjusted)						(As adjusted)
Balance beginning of period	$	13,499		$	9,017		$	10,584		$	9,998
Warranties assumed due to acquisition		526			2,034			3,682			2,034
New warranties issued		1,657			1,176			3,929			2,104
Warranty expenditures		(2,672	)		(1,437	)		(5,185	)		(3,346	)
Balance end of period	$	13,010		$	10,790		$	13,010		$	10,790

Summary of Long-term Liabilities

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

	December 31, 2017		June 30, 2017
Acquisition related deferred payments, less current portion	$	15,037	$	—
Acquisition-related contingent consideration obligations, less current portion		36,130		—
Other		13,180		8,526
Total other accrued liabilities	$	64,347	$	8,526

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

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

	Three Months Ended		Six Months Ended
	December 31, 2017	December 31, 2016	December 31, 2017	December 31, 2016
		(As adjusted)		(As adjusted)
Westcon Group Inc.	14%	12%	15%	12%
Tech Data Corporation	12%	15%	12%	16%
Jenne Corporation	*	13%	10%	14%
Avnet	*	*	*	10%

Fair Value Measurements (Tables)

6 Months Ended

Dec. 31, 2017

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):

December 31, 2017	Level 1		Level 2		Level 3		Total
Assets
Investments:
Money market funds	$	4,500	$	—	$	—	$	4,500
Marketable securities		1,104		—		—		1,104
Total assets measured at fair value	$	5,604	$	—	$	—	$	5,604
Liabilities
Acquisition-related contingent consideration obligations	$	—	$	—	$	47,030	$	—
Total liabilities measured at fair value	$	—	$	—	$	47,030	$	—

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
	December 31, 2017
Beginning balance	$	—
Initial fair value measurements		47,030
Change in fair value		—
Ending balance	$	47,030

Share-based Compensation (Tables)

6 Months Ended

Dec. 31, 2017

Share Based Compensation [Abstract]

Shares Reserved for Issuance

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

	December 31, 2017		June 30, 2017
2014 Employee Stock Purchase Plan		6,517		7,785
Employee stock options and awards outstanding		10,900		9,726
2013 Equity Incentive Plan shares available for grant		12,242		7,629
Total shares reserved for issuance		29,659		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				Six Months Ended
	December 31, 2017		December 31, 2016		December 31, 2017		December 31, 2016
Cost of product revenue	$	134	$	122	$	226	$	190
Cost of service revenue		296		186		429		418
Research and development		1,829		906		2,880		1,968
Sales and marketing		2,699		1,180		4,342		2,321
General and administrative		2,067		987		3,951		1,959
Total share-based compensation expense	$	7,025	$	3,381	$	11,828	$	6,856

Summary of Stock Award Activity

The following table summarizes stock award activity for the six months ended December 31, 2017 (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		3,726			11.13
Vested		(1,871	)		3.78
Cancelled		(160	)		5.17
Non-vested stock awards outstanding at December 31, 2017		8,359		$	7.73	$	104,653

Summary of Stock Option Activity

The following table summarizes stock option activity for the six months ended December 31, 2017(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		(517	)		4.42
Cancelled		(4	)		4.31
Options outstanding at December 31, 2017		2,541		$	3.99		3.28	$	21,687
Vested and expected to vest at December 31, 2017		2,541		$	3.99		3.28	$	21,687
Exercisable at December 31, 2017		2,126		$	4.24		3.08	$	17,599

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

	Employee Stock Purchase Plan
	Six Month Ended
	December 31, 2017			December 31, 2016
Expected life	0.50 years			0.50 years
Risk-free interest rate		1.15	%		0.40	%
Volatility		42	%		40	%
Dividend yield		—	%		—	%

Restructuring Charges (Tables)

6 Months Ended

Dec. 31, 2017

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 payments		(397	)		(1,770	)		(73	)		(2,240	)
Balance as of December 31, 2017	$	1,787		$	83		$	12		$	1,882
Less: current portion included in other accrued liabilities											473
Restructuring accrual included in other long-term liabilities										$	1,409

Net Loss Per Share (Tables)

6 Months Ended

Dec. 31, 2017

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						Six Months Ended
	December 31, 2017			December 31, 2016			December 31, 2017			December 31, 2016
				(As adjusted)						(As adjusted)
Net loss	$	(31,923	)	$	(4,229	)	$	(27,547	)	$	(9,971	)
Weighted-average shares used in per share calculation - basic and diluted		113,621			107,425			112,931			106,690
Net loss per share - basic and diluted	$	(0.28	)	$	(0.04	)	$	(0.24	)	$	(0.09	)

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				Six Months Ended
	December 31, 2017		December 31, 2016		December 31, 2017		December 31, 2016
Options to purchase common stock		2,622		2,301		2,781		2,762
Restricted stock units		7,950		28		7,162		79
Employee Stock Purchase Plan shares		834		330		906		330
Total shares excluded		11,406		2,659		10,849		3,171

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

6 Months Ended

Dec. 31, 2017

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
	December 31, 2017						December 31, 2016
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	56,269	$	54,559	$	110,828	$	39,063	$	38,396	$	77,459
Other		1,155		5,698		6,853		2,827		3,243		6,070
Total Americas		57,424		60,257		117,681		41,890		41,639		83,529
EMEA:		55,956		33,624		89,580		36,070		24,361		60,431
APAC:		5,131		18,731		23,862		1,613		10,804		12,417
Total net revenues	$	118,511	$	112,612	$	231,123	$	79,573	$	76,804	$	156,377

	Six Months Ended
	December 31, 2017						December 31, 2016
							(As adjusted)
	Distributor		Direct		Total		Distributor		Direct		Total
Americas:
United States	$	98,661	$	105,549	$	204,210	$	66,054	$	65,225	$	131,279
Other		15,491		12,093		27,584		4,220		12,871		17,091
Total Americas		114,152		117,642		231,794		70,274		78,096		148,370
EMEA:		107,188		61,527		168,715		67,369		40,890		108,259
APAC:		8,395		33,934		42,329		3,065		19,287		22,352
Total net revenues	$	229,735	$	213,103	$	442,838	$	140,708	$	138,273	$	278,981

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

Long Lived Assets	December 31, 2017		June 30, 2017
			(As adjusted)
Americas	$	187,617	$	67,369
EMEA		10,066		8,998
APAC		8,075		4,275
Total long lived assets	$	205,758	$	80,642

Business Combinations (Narratives) (Details) $ in Thousands						3 Months Ended			6 Months Ended
Business Combinations (Narratives) (Details) $ in Thousands	Dec. 01, 2017 USD ($)	Oct. 27, 2017 USD ($) Quarter	Jul. 14, 2017	Mar. 07, 2017 USD ($)	Oct. 28, 2016 USD ($)	Dec. 31, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) Acquisition	Dec. 31, 2016 USD ($)	Sep. 30, 2017 USD ($)
Business Acquisition [Line Items]
Number of acquisitions completed \| Acquisition									3
Upfront cash closing payment									$ 97,581	$ 51,088
Acquisition and integration related expenses						$ 34,115		$ 4,169	38,359	$ 6,490
Recorded gain from bargain purchase									4,920
Data Center Business
Business Acquisition [Line Items]
Business acquisition 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
Acquisition and integration related expenses						32,500			33,800
Business acquisition, purchase price		$ 84,337
Net assets acquired, financing receivables		33,488
Net assets acquired, identifiable intangible assets		$ 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]
Acquisition and integration related expenses						6,600			9,500
Asset purchase agreement closing date			Jul. 14, 2017
Business acquisition, purchase price				$ 100,000
Business acquisition, deposits amount							$ 10,200
Business acquisition, provisional consideration				$ 79,800
Net assets acquired, financing receivables						18,295			18,295		$ 18,112
Net assets acquired, identifiable intangible assets						46,900			46,900		$ 44,000
Campus Fabric Business \| In-Process Research and Development
Business Acquisition [Line Items]
Fair value of indefinite lived intangibles						$ 2,500			$ 2,500
Capital Financing Business
Business Acquisition [Line Items]
Business combination, payments to seller in percentage of finance receivables	90.00%
Net assets acquired, financing receivables	$ 13,800
Net assets acquired, lease equipment	3,500
Net assets acquired, identifiable intangible assets	600
Fair value of contingent consideration	12,900
Capital Financing Business \| Acquisition and Integration Costs
Business Acquisition [Line Items]
Recorded gain from bargain purchase	$ 4,900
Zebra Technologies Corporation
Business Acquisition [Line Items]
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		6 Months Ended
	Oct. 27, 2017	Dec. 31, 2017	Dec. 31, 2016
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
	Dec. 31, 2017	Oct. 27, 2017	Sep. 30, 2017	Jun. 30, 2017
Preliminary Allocation
Goodwill	$ 130,988			$ 80,216
Data Center Business
Preliminary Allocation
Accounts receivables		$ 33,488
Inventories		19,973
Prepaid expenses and other current assets		988
Property and equipment		29,160
Other assets		4,734
Accounts payable and accrued expenses		(15,850)
Deferred revenue		(33,519)
Total tangible assets acquired and liabilities assumed		38,974
Identifiable intangible assets		28,600
Goodwill		16,763
Total intangible assets acquired		45,363
Total net assets acquired		$ 84,337
Campus Fabric Business
Preliminary Allocation
Accounts receivables	18,295		$ 18,112
Inventories	15,545		16,605
Prepaid expenses and other current assets	673		673
Property and equipment	3,768		3,768
Other assets	5,311		2,568
Accounts payable and accrued expenses	(31,919)		(29,716)
Deferred revenue	(10,051)		(10,214)
Other long-term liabilities	(5,205)		(6,608)
Total tangible assets acquired and liabilities assumed	(3,583)		(4,812)
Identifiable intangible assets	46,900		44,000
In-process research and development	2,500		2,300
Goodwill	34,009		38,338
Total intangible assets acquired	83,409		84,638
Total net assets acquired	79,826		$ 79,826
Change during three months ended December 31, 2017
Adjustments, Accounts receivables	183
Adjustments, Inventory	(1,060)
Adjustments, Other assets	2,743
Adjustments, Accounts payable and accrued expenses	(2,203)
Adjustments, Deferred revenue	163
Adjustments, Other long-term liabilities	1,403
Adjustments, Net tangible assets acquired	1,229
Adjustments, Identifiable intangible assets	2,900
Adjustments, In-process research and development	200
Adjustments, Goodwill	(4,329)
Adjustments, Total intangible assets acquired	$ (1,229)

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	$ 28,600
Data Center Business \| Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Amount	$ 21,800
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		$ 46,900
Campus Fabric Business \| Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)		6 years
Amount		$ 37,400
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 \| Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life (in years)		5 years
Amount		$ 2,600
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	Dec. 31, 2017	Jun. 30, 2017	Oct. 28, 2016
Final Allocation
Goodwill	$ 130,988	$ 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		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition Pro Forma Information [Abstract]
Net revenues	$ 252,532	$ 311,503	$ 537,040	$ 644,435
Net income (loss)	$ 1,152	$ (62,134)	$ (7,622)	$ (95,972)
Net income (loss) per share - basic	$ 0.01	$ (0.58)	$ (0.07)	$ (0.90)
Net income (loss) per share - diluted	$ 0.01	$ (0.58)	$ (0.07)	$ (0.90)
Shares used in per share calculation - basic	113,621	107,425	112,931	106,690
Shares used in per share calculation - diluted	119,656	107,425	112,931	106,690

Summary of Significant Accounting Policies (Narratives) (Details)	3 Months Ended		6 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) Distribution_Channels	Dec. 31, 2016 USD ($)	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	$ 152,400,000		$ 152,400,000
Remaining revenue performance obligation, percentage of revenue expected to be recognized in 2018			54.00%
Remaining revenue performance obligation, percentage of revenue expected to be recognized in 2019			31.00%
Remaining revenue performance obligation, percentage of revenue expected to be recognized thereafter			15.00%
Revenue recognized for deferred revenue balance	36,900,000	$ 33,500,000	$ 53,100,000	$ 49,700,000
Commission Fees
Significant Accounting Policies [Line Items]
Contract costs capitalized, amount	3,000,000		$ 3,000,000		$ 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	$ 900,000	$ 700,000
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		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Significant Accounting Policies [Line Items]
Net Revenues	$ 231,123	$ 156,377	$ 442,838	$ 278,981
Distributor
Significant Accounting Policies [Line Items]
Net Revenues	118,511	79,573	229,735	140,708
Direct
Significant Accounting Policies [Line Items]
Net Revenues	112,612	76,804	213,103	138,273
United States
Significant Accounting Policies [Line Items]
Net Revenues	110,828	77,459	204,210	131,279
United States \| Distributor
Significant Accounting Policies [Line Items]
Net Revenues	56,269	39,063	98,661	66,054
United States \| Direct
Significant Accounting Policies [Line Items]
Net Revenues	54,559	38,396	105,549	65,225
Other Americas
Significant Accounting Policies [Line Items]
Net Revenues	6,853	6,070	27,584	17,091
Other Americas \| Distributor
Significant Accounting Policies [Line Items]
Net Revenues	1,155	2,827	15,491	4,220
Other Americas \| Direct
Significant Accounting Policies [Line Items]
Net Revenues	5,698	3,243	12,093	12,871
Total Americas
Significant Accounting Policies [Line Items]
Net Revenues	117,681	83,529	231,794	148,370
Total Americas \| Distributor
Significant Accounting Policies [Line Items]
Net Revenues	57,424	41,890	114,152	70,274
Total Americas \| Direct
Significant Accounting Policies [Line Items]
Net Revenues	60,257	41,639	117,642	78,096
EMEA
Significant Accounting Policies [Line Items]
Net Revenues	89,580	60,431	168,715	108,259
EMEA \| Distributor
Significant Accounting Policies [Line Items]
Net Revenues	55,956	36,070	107,188	67,369
EMEA \| Direct
Significant Accounting Policies [Line Items]
Net Revenues	33,624	24,361	61,527	40,890
APAC
Significant Accounting Policies [Line Items]
Net Revenues	23,862	12,417	42,329	22,352
APAC \| Distributor
Significant Accounting Policies [Line Items]
Net Revenues	5,131	1,613	8,395	3,065
APAC \| Direct
Significant Accounting Policies [Line Items]
Net Revenues	$ 18,731	$ 10,804	$ 33,934	$ 19,287

Recent Accounting Pronouncements - (Narratives) (Details) - ASU 2014-09	6 Months Ended
	Dec. 31, 2017
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 ASU 2014-09 On Condensed Consolidated Balance Sheet (Unaudited) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Accounts receivable, net	$ 154,906		$ 93,115
Inventories	83,377		47,410
Total current assets	390,163		298,842
Other assets	44,267		25,065
Total assets	726,908		459,700
Accrued warranty	13,010	$ 13,499	10,584	$ 10,790	$ 9,017	$ 9,998
Other accrued liabilities	74,517		37,044
Total current liabilities	346,274		213,205
Accumulated deficit	(808,833)		(781,286)
Total stockholders’ equity	111,719		125,678
Total liabilities and stockholders’ equity	$ 726,908		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 \| ASU 2014-09
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 ASU 2014-09 On Condensed Consolidated Statement of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Net revenues:
Product	$ 174,850	$ 118,055	$ 339,624	$ 208,148
Service	56,273	38,322	103,214	70,833
Total net revenues	231,123	156,377	442,838	278,981
Cost of revenues:
Product	78,472	62,627	158,517	106,876
Service	23,665	14,098	42,954	26,567
Total cost of revenues	102,137	76,725	201,471	133,443
Gross profit:
Product	96,378	55,428	181,107	101,272
Service	32,608	24,224	60,260	44,266
Total gross profit	128,986	79,652	241,367	145,538
Sales and marketing	65,659	41,025	121,220	77,884
Operating loss	(31,110)	(2,980)	(26,618)	(7,002)
Net loss before tax	(33,540)	(3,050)	(27,489)	(7,885)
Net loss	$ (31,923)	$ (4,229)	$ (27,547)	$ (9,971)
Basic and diluted net loss per share
Net loss per share - basic	$ (0.28)	$ (0.04)	$ (0.24)	$ (0.09)
Net loss per share - diluted	$ (0.28)	$ (0.04)	$ (0.24)	$ (0.09)
Shares used in per share calculation - basic	113,621	107,425	112,931	106,690
Shares used in per share calculation - diluted	113,621	107,425	112,931	106,690
As Reported
Net revenues:
Product		$ 109,789		$ 199,920
Service		38,322		70,833
Total net revenues		148,111		270,753
Cost of revenues:
Product		58,659		103,586
Service		14,098		26,567
Total cost of revenues		72,757		130,153
Gross profit:
Product		51,130		96,334
Service		24,224		44,266
Total gross profit		75,354		140,600
Sales and marketing		41,109		78,065
Operating loss		(7,362)		(12,121)
Net loss before tax		(7,432)		(13,004)
Net loss		$ (8,611)		$ (15,090)
Basic and diluted net loss per share
Net loss per share - basic		$ (0.08)		$ (0.14)
Net loss per share - diluted		$ (0.08)		$ (0.14)
Shares used in per share calculation - basic		107,425		106,690
Shares used in per share calculation - diluted		107,425		106,690
Adjustment \| ASU 2014-09
Net revenues:
Product		$ 8,266		$ 8,228
Total net revenues		8,266		8,228
Cost of revenues:
Product		3,968		3,290
Total cost of revenues		3,968		3,290
Gross profit:
Product		4,298		4,938
Total gross profit		4,298		4,938
Sales and marketing		(84)		(181)
Operating loss		4,382		5,119
Net loss before tax		4,382		5,119
Net loss		$ 4,382		$ 5,119

Recent Accounting Pronouncements - Schedule of Effect of Adoption of ASU 2014-09 On Condensed Consolidated Statement of Cash Flows (Unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net loss	$ (31,923)	$ (4,229)	$ (27,547)	$ (9,971)
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed
Accounts receivable			(11,188)	(7,756)
Inventories			(449)	4,313
Prepaid expenses and other assets			1,188	6,823
Other current and long term liabilities			3,387	7,875
Net cash provided by operating activities			14,248	19,288
Cash flows from investing activities			(105,968)	(55,750)
Cash flows from financing activities			88,284	46,241
Foreign currency effect on cash			94	(115)
Net (decrease) increase in cash and cash equivalents			$ (3,342)	9,664
As Reported
Cash flows from operating activities:
Net loss		(8,611)		(15,090)
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed
Accounts receivable				(18,737)
Inventories				6,004
Prepaid expenses and other assets				7,004
Deferred distributors revenue, net of cost of sales to distributors				14,516
Other current and long term liabilities				7,587
Net cash provided by operating activities				19,288
Cash flows from investing activities				(55,750)
Cash flows from financing activities				46,241
Foreign currency effect on cash				(115)
Net (decrease) increase in cash and cash equivalents				9,664
Adjustment \| ASU 2014-09
Cash flows from operating activities:
Net loss		$ 4,382		5,119
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed
Accounts receivable				10,981
Inventories				(1,691)
Prepaid expenses and other assets				(181)
Deferred distributors revenue, net of cost of sales to distributors				(14,516)
Other current and long term liabilities				$ 288

Balance Sheet Accounts (Summary of Cash, Cash Equivalents and Marketable Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Cash	$ 122,608	$ 126,159
Cash equivalents	4,500	4,291
Total cash and cash equivalents	127,108	130,450	$ 103,786	$ 94,122
Marketable securities (consisting of available-for-sale securities)	1,104
Total cash, cash equivalents and marketable securities	$ 128,212	$ 130,450

Balance Sheet Accounts (Narratives) (Details) - USD ($)			6 Months Ended
Balance Sheet Accounts (Narratives) (Details) - USD ($)	Oct. 26, 2017	Jul. 14, 2017	Dec. 31, 2017	Dec. 31, 2016	Oct. 28, 2016
Balance Sheet Accounts [Line Items]
Additional goodwill related to acquisition			$ 50,772,000
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)			24.00%
Accounts Receivable \| Tech Data Corporation
Balance Sheet Accounts [Line Items]
Concentration risk (percent)			21.00%
Accounts Receivable \| Avnet
Balance Sheet Accounts [Line Items]
Concentration risk (percent)			11.00%
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%
Campus Fabric Business
Balance Sheet Accounts [Line Items]
Additional goodwill related to acquisition			$ 34,000,000
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			16,800,000
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 \| 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%
Cash equivalents \| Maximum
Balance Sheet Accounts [Line Items]
Maturity period for investments			3 months
Short-term investments \| Maximum
Balance Sheet Accounts [Line Items]
Maturity period for investments			1 year
Short-term investments \| Minimum
Balance Sheet Accounts [Line Items]
Maturity period for investments			3 months

Balance Sheet Accounts (Components of Inventories) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Finished goods	$ 67,244	$ 46,620
Raw materials	16,133	790
Total Inventories	$ 83,377	$ 47,410

Balance Sheet Accounts (Components of Property and Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 126,459	$ 80,399
Less: accumulated depreciation and amortization	(57,894)	(50,159)
Property and equipment, net	68,565	30,240
Computers and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	63,539	34,716
Purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	16,329	11,785
Office equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	17,272	10,852
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 29,319	$ 23,046

Balance Sheet Accounts (Components of Gross and Net Intangible Asset Balances) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2017	Jun. 30, 2017
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 199,137	$ 121,627
Accumulated Amortization	108,712	97,690
Net Carrying Amount	90,425	23,937
Gross Carrying Amount, Intangibles	201,637	123,027
Net Carrying Amount, Intangibles	92,925	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	$ 2,500	$ 1,400
Developed technology
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	4 years 6 months	5 years 3 months 19 days
Gross Carrying Amount	$ 116,000	$ 55,400
Accumulated Amortization	48,334	42,689
Net Carrying Amount	$ 67,666	$ 12,711
Customer relationships
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	3 years 10 months 25 days	3 years 3 months 19 days
Gross Carrying Amount	$ 51,410	$ 40,300
Accumulated Amortization	38,674	37,567
Net Carrying Amount	$ 12,736	$ 2,733
Maintenance contracts
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	9 months 19 days	1 year 3 months 19 days
Gross Carrying Amount	$ 17,000	$ 17,000
Accumulated Amortization	14,166	12,467
Net Carrying Amount	$ 2,834	$ 4,533
Trademarks
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	3 years 10 months 25 days	4 years 3 months 19 days
Gross Carrying Amount	$ 9,100	$ 5,100
Accumulated Amortization	3,411	2,846
Net Carrying Amount	5,689	$ 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	6 years 1 month 7 days	6 years 4 months 25 days
Gross Carrying Amount	$ 2,445	$ 2,445
Accumulated Amortization	1,255	1,120
Net Carrying Amount	$ 1,190	$ 1,325
Other intangibles
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Amortization Period	2 years 2 months 13 days	2 years 8 months 13 days
Gross Carrying Amount	$ 1,382	$ 1,382
Accumulated Amortization	1,072	1,001
Net Carrying Amount	$ 310	$ 381

Balance Sheet Accounts (Summary of Amortization Expense of Intangibles) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Amortization in “Cost of revenues: Product”	$ 3,866	$ 1,720	$ 6,663	$ 5,276
Amortization of intangibles	2,746	2,175	4,360	6,317
Total amortization	$ 6,612	$ 3,895	$ 11,023	$ 11,593

Balance Sheet Accounts (Summary of Goodwill) (Details) $ in Thousands	6 Months Ended
	Dec. 31, 2017 USD ($)
Goodwill [Roll Forward]
Balance as of June 30, 2017	$ 80,216
Additions due to acquisitions	50,772
Balance at end of period	$ 130,988

Balance Sheet Accounts (Components of Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Line Of Credit Facility [Line Items]
Current portion of long-term debt	$ 22,426	$ 12,280
Less: unamortized debt issuance costs	(538)	(164)
Long-term debt, less current portion	160,712	80,422
Less: unamortized debt issuance costs	(1,350)	(846)
Total debt	183,138	92,702
Term Loan
Line Of Credit Facility [Line Items]
Current portion of long-term debt	22,964	12,444
Long-term debt, less current portion	152,062	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		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance beginning of period	$ 13,499	$ 9,017	$ 10,584	$ 9,998
Warranties assumed due to acquisition	526	2,034	3,682	2,034
New warranties issued	1,657	1,176	3,929	2,104
Warranty expenditures	(2,672)	(1,437)	(5,185)	(3,346)
Balance end of period	$ 13,010	$ 10,790	$ 13,010	$ 10,790

Balance Sheet Accounts (Summary of Long-term Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Acquisition related deferred payments, less current portion	$ 15,037
Acquisition-related contingent consideration obligations, less current portion	36,130
Other	13,180	$ 8,526
Total other accrued liabilities	$ 64,347	$ 8,526

Balance Sheet Accounts (Schedule of Major Customers Accounting for 10% or More of Net Revenue) (Details) - Net Revenue	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Tech Data Corporation
Concentration Risk [Line Items]
Concentration risk (percent)	12.00%	15.00%	12.00%	16.00%
Jenne Corporation
Concentration Risk [Line Items]
Concentration risk (percent)		13.00%	10.00%	14.00%
Westcon Group Inc.
Concentration Risk [Line Items]
Concentration risk (percent)	14.00%	12.00%	15.00%	12.00%
Avnet
Concentration Risk [Line Items]
Concentration risk (percent)				10.00%

Fair Value Measurements (Schedule of Fair Value for Financial Assets and Liabilities Measured on Recurring Basis) (Details) - Recurring - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Assets
Total assets measured at fair value	$ 5,604	$ 7,291
Money market funds
Assets
Investments	4,500	4,291
Marketable securities
Assets
Investments	1,104
Investment in non-marketable equity
Assets
Investments		3,000
Level 1
Assets
Total assets measured at fair value	5,604	4,291
Level 1 \| Money market funds
Assets
Investments	4,500	4,291
Level 1 \| Marketable securities
Assets
Investments	1,104
Level 3
Assets
Total assets measured at fair value		3,000
Liabilities
Acquisition-related contingent consideration obligations	47,030
Total liabilities measured at fair value	$ 47,030
Level 3 \| Investment in non-marketable equity
Assets
Investments		$ 3,000

Fair Value Measurements (Narratives) (Details) - USD ($)	3 Months Ended	6 Months Ended		12 Months Ended
	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2015	Jun. 30, 2017
Level 1 Investments
Assets
Sale of non-marketable equity investment in shares market value		$ 1,100,000
Level 1 Investments \| UK Stock Exchange
Assets
Shares received for sale of non-marketable equity investment	41,685
Level 2 Investments
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		$ 185,000,000			$ 93,700,000
Level 3
Assets
Shares received for sale of non-marketable equity investment	41,685
Sale of non-marketable equity investment in shares market value	$ 900,000
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
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 \| 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 \| 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 $ in Thousands	3 Months Ended
	Dec. 31, 2017 USD ($)
Business Acquisition Contingent Consideration [Line Items]
Initial fair value measurements	$ 47,030
Ending balance	$ 47,030

Share-based Compensation (Shares Reserved for Issuance) (Details) - shares shares in Thousands	Dec. 31, 2017	Jun. 30, 2017
Class Of Stock [Line Items]
Shares reserved for issuance	29,659	25,140
2014 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Shares reserved for issuance	6,517	7,785
Employee Stock Options and Awards Outstanding
Class Of Stock [Line Items]
Shares reserved for issuance	10,900	9,726
2013 Equity Incentive Plan Shares Available for Grant
Class Of Stock [Line Items]
Shares reserved for issuance	12,242	7,629

Share-based Compensation (Schedule of Recognized Share-based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 7,025	$ 3,381	$ 11,828	$ 6,856
Cost of Product Revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	134	122	226	190
Cost of Service Revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	296	186	429	418
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	1,829	906	2,880	1,968
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	2,699	1,180	4,342	2,321
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 2,067	$ 987	$ 3,951	$ 1,959

Share-based Compensation (Summary of Stock Award Activity) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Dec. 31, 2017 USD ($) $ / shares shares	Jun. 30, 2017 USD ($)
Number of Shares
Non-vested stock awards outstanding at June 30, 2017 \| shares	6,664
Granted \| shares	3,726
Vested \| shares	(1,871)
Cancelled \| shares	(160)
Non-vested stock awards outstanding at December 31, 2017 \| shares	8,359
Weighted-Average Grant Date Fair Value
Non-vested stock awards outstanding at June 30, 2017 \| $ / shares	$ 4.66
Granted \| $ / shares	11.13
Vested \| $ / shares	3.78
Cancelled \| $ / shares	5.17
Non-vested stock awards outstanding at December 31, 2017 \| $ / shares	$ 7.73
Aggregate Fair Market Value
Non-vested stock awards outstanding at June 30, 2017 \| $	$ 104,653	$ 61,440

Share-based Compensation (Summary of Stock Option Activity) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2017	Jun. 30, 2017
Number of Shares
Options outstanding at June 30, 2017	3,062
Exercised	(517)
Cancelled	(4)
Options outstanding at December 31, 2017	2,541	3,062
Vested and expected to vest at December 31, 2017	2,541
Exercisable at December 31, 2017	2,126
Weighted-Average Exercise Price Per Share
Options outstanding at June 30, 2017	$ 4.06
Exercised	4.42
Cancelled	4.31
Options outstanding at December 31, 2017	3.99	$ 4.06
Vested and expected to vest at December 31, 2017	3.99
Exercisable at December 31, 2017	$ 4.24
Weighted-Average Remaining Contractual Term
Options outstanding	3 years 3 months 10 days	4 years 2 months 8 days
Vested and expected to vest at December 31, 2017	3 years 3 months 10 days
Exercisable at December 31, 2017	3 years 29 days
Aggregate Intrinsic Value
Options outstanding	$ 21,687	$ 15,868
Vested and expected to vest at December 31, 2017	21,687
Exercisable at December 31, 2017	$ 17,599

Share-based Compensation (Narratives) (Details)	3 Months Ended				6 Months Ended
Share-based Compensation (Narratives) (Details)	Dec. 31, 2017 shares	Sep. 30, 2017 Quarter $ / shares shares	Dec. 31, 2016 shares	Sep. 30, 2016 $ / shares shares	Dec. 31, 2017 $ / shares shares	Dec. 31, 2016 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted \| shares					3,726,000
Restricted stock units granted, grant date fair value					$ 11.13
2014 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value of options granted (in dollars per share)					$ 2.41	$ 1.00
Stock options granted \| shares	0		0		1,267,930	1,103,599
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
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%
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%
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	6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected life	6 months	6 months
Risk-free interest rate	1.15%	0.40%
Volatility	42.00%	40.00%

Restructuring Charges (Narratives) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
Restructuring Charges (Narratives) (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0	$ 1,900,000	$ 0	$ 1,900,000
Accelerated depreciation of leasehold improvements and fixed assets		1,700,000		1,700,000
Cash payments			2,240,000
Reduction-in-force
Restructuring Cost and Reserve [Line Items]
Severance and benefits charges					$ 5,600,000
Cash payments			$ 2,200,000
Sub Lease Income for Non-cancelable Lease Payments for Excess Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 100,000		$ 100,000

Restructuring Charges (Restructuring Liabilities) (Details) $ in Thousands	6 Months Ended
	Dec. 31, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 4,122
Period payments	(2,240)
Ending balance	1,882
Less: current portion included in other accrued liabilities	473
Restructuring accrual included in other long-term liabilities	1,409
Excess Facilities
Restructuring Cost and Reserve [Line Items]
Beginning balance	2,184
Period payments	(397)
Ending balance	1,787
Severance Benefits
Restructuring Cost and Reserve [Line Items]
Beginning balance	1,853
Period payments	(1,770)
Ending balance	83
Other
Restructuring Cost and Reserve [Line Items]
Beginning balance	85
Period payments	(73)
Ending balance	$ 12

Commitments and Contingencies (Narratives) (Details) - Dec. 31, 2017 BRL in Millions	USD ($)	BRL
Foreign \| Secretariat of the Federal Revenue Bureau of Brazil
Loss Contingencies [Line Items]
Value of tax credits disallowed	$ 1,000,000	BRL 3.4
Penalties, court costs, attorneys’ fees, and accrued interest	5,100,000	16.7
Tax liability related to the ICMS Tax Assessments, accrued	2,900,000	BRL 9.4
Inventory Purchase Commitments
Loss Contingencies [Line Items]
Non-cancelable purchase commitments	145,300,000
Software and Support Services Commitments
Loss Contingencies [Line Items]
Non-cancelable purchase commitments	$ 19,000,000

Income Taxes (Narratives) (Details) - USD ($)		3 Months Ended		6 Months Ended
Income Taxes (Narratives) (Details) - USD ($)	Dec. 22, 2017	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Provision (benefit) for income taxes		$ (1,617,000)	$ 1,179,000		$ 58,000	$ 2,086,000
U.S. Federal tax rate					35.00%
Tax provision offset by tax benefit		2,500,000			$ 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		19,000,000			19,000,000
Unrecognized tax benefit future impact if recognized		18,900,000			18,900,000
Enterasys, Zebra WLAN Business and Campus Fabric Business
Operating Loss Carryforwards [Line Items]
Tax amortization deduction for capitalized goodwill		2,100,000	$ 3,700,000		2,100,000	$ 3,700,000
Deferred tax liability, goodwill		$ 4,900,000			$ 4,900,000
Amortization period for tax purposes					15 years
Fiscal 2018
Operating Loss Carryforwards [Line Items]
U.S. Federal tax rate	28.00%
Scenario, Forecast
Operating Loss Carryforwards [Line Items]
U.S. Federal tax rate				21.00%

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		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share Basic And Diluted [Abstract]
Net loss	$ (31,923)	$ (4,229)	$ (27,547)	$ (9,971)
Weighted-average shares used in per share calculation - basic and diluted	113,621	107,425	112,931	106,690
Net loss per share - basic and diluted	$ (0.28)	$ (0.04)	$ (0.24)	$ (0.09)

Net Loss Per Share (Schedule of Anti-Dilutive Shares Excluded from Earnings Per Share Calculation) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of EPS	11,406	2,659	10,849	3,171
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of EPS	2,622	2,301	2,781	2,762
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of EPS	7,950	28	7,162	79
Employee Stock Purchase Plan shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of EPS	834	330	906	330

Foreign Exchange Forward Contracts (Narratives) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Foreign currency transaction realized gain (loss)	$ (600,000)	$ 1,100,000	$ (1,100,000)	$ 800,000
Not Designated as Hedging Instrument \| Forward Foreign Currency Contracts
Derivative [Line Items]
Notional principal amount of forward foreign currency contracts	$ 1,500,000		$ 1,500,000
Maximum maturities for contracts			60 days
Derivative instruments outstanding		$ 0		$ 0

Disclosure about Segments of an Enterprise and Geographic Areas (Narratives) (Details)	6 Months Ended
	Dec. 31, 2017 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		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total net revenues	$ 231,123	$ 156,377	$ 442,838	$ 278,981
Distributor
Segment Reporting Information [Line Items]
Total net revenues	118,511	79,573	229,735	140,708
Direct
Segment Reporting Information [Line Items]
Total net revenues	112,612	76,804	213,103	138,273
United States
Segment Reporting Information [Line Items]
Total net revenues	110,828	77,459	204,210	131,279
United States \| Distributor
Segment Reporting Information [Line Items]
Total net revenues	56,269	39,063	98,661	66,054
United States \| Direct
Segment Reporting Information [Line Items]
Total net revenues	54,559	38,396	105,549	65,225
Other Americas
Segment Reporting Information [Line Items]
Total net revenues	6,853	6,070	27,584	17,091
Other Americas \| Distributor
Segment Reporting Information [Line Items]
Total net revenues	1,155	2,827	15,491	4,220
Other Americas \| Direct
Segment Reporting Information [Line Items]
Total net revenues	5,698	3,243	12,093	12,871
Total Americas
Segment Reporting Information [Line Items]
Total net revenues	117,681	83,529	231,794	148,370
Total Americas \| Distributor
Segment Reporting Information [Line Items]
Total net revenues	57,424	41,890	114,152	70,274
Total Americas \| Direct
Segment Reporting Information [Line Items]
Total net revenues	60,257	41,639	117,642	78,096
EMEA
Segment Reporting Information [Line Items]
Total net revenues	89,580	60,431	168,715	108,259
EMEA \| Distributor
Segment Reporting Information [Line Items]
Total net revenues	55,956	36,070	107,188	67,369
EMEA \| Direct
Segment Reporting Information [Line Items]
Total net revenues	33,624	24,361	61,527	40,890
APAC
Segment Reporting Information [Line Items]
Total net revenues	23,862	12,417	42,329	22,352
APAC \| Distributor
Segment Reporting Information [Line Items]
Total net revenues	5,131	1,613	8,395	3,065
APAC \| Direct
Segment Reporting Information [Line Items]
Total net revenues	$ 18,731	$ 10,804	$ 33,934	$ 19,287

Disclosure about Segments of an Enterprise and Geographic Areas (Schedule of Long Lived Assets by Segment) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Segment Reporting Information [Line Items]
Total long lived assets	$ 205,758	$ 80,642
Americas
Segment Reporting Information [Line Items]
Total long lived assets	187,617	67,369
EMEA
Segment Reporting Information [Line Items]
Total long lived assets	10,066	8,998
APAC
Segment Reporting Information [Line Items]
Total long lived assets	$ 8,075	$ 4,275

Subsequent Event (Narratives) (Details) - Subsequent Event - The Plan $ in Millions	Jan. 31, 2018 USD ($)
Subsequent Event [Line Items]
Execution date of plan	Feb. 02, 2018
Severance Benefits
Subsequent Event [Line Items]
Expected charges	$ 4.0
Severance Benefits \| Minimum
Subsequent Event [Line Items]
Expected annualized savings	7.0
Severance Benefits \| Maximum
Subsequent Event [Line Items]
Expected annualized savings	$ 9.0