| Document And Entity Information | Jan. 29, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 29, 2020 |
| Entity Registrant Name | EXTREME NETWORKS INC |
| Entity Central Index Key | 0001078271 |
| Entity Emerging Growth Company | false |
| Entity File Number | 000-25711 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 77-0430270 |
| Entity Address, Address Line One | 6480 Via Del Oro |
| Entity Address, City or Town | San Jose |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 95119 |
| City Area Code | 408 |
| Local Phone Number | 579-2800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of each class | Common Stock |
| Trading Symbol(s) | EXTR |
| Name of each exchange on which registered | NASDAQ |
