XML 63 R53.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Employee Benefit Plans (Common Stock Reserved for Future Issuance) (Details) - shares shares in Thousands | Sep. 30, 2022 | Jun. 30, 2022
--- | --- | ---
Class Of Stock [Line Items] |  |
Shares reserved for issuance | 23,831 | 29,007
2014 Employee Stock Purchase Plan |  |
Class Of Stock [Line Items] |  |
Shares reserved for issuance | 9,280 | 9,961
Employee Stock Options and Awards Outstanding |  |
Class Of Stock [Line Items] |  |
Shares reserved for issuance | 11,210 | 7,616
2013 Equity Incentive Plan Shares Available for Grant |  |
Class Of Stock [Line Items] |  |
Shares reserved for issuance | 3,341 | 11,430

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=extr_TwoThousandFourteenEmployeeStockPurchasePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=extr_EmployeeStockOptionsAndAwardsOutstandingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=extr_TwoThousandThirteenEquityIncentivePlanSharesAvailableForGrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |