v3.10.0.1
Document and Entity Information - shares
3 Months Ended
Sep. 30, 2018
Oct. 30, 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 Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Document Type 10-Q  
Document Period End Date Sep. 30, 2018  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Trading Symbol EXTR  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   118,337,479