XML 85 R71.htm IDEA: XBRL DOCUMENT
v3.19.1

Restructuring Charges, Net of Reversals (Narratives) (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring charges, net of reversals |  | $ 4,920,000 | $ 1,282,000 | $ 4,920,000
Cash payments |  |  | 5,699,000 |
Reduction-in-force |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Restructuring charges, net of reversals | $ 0 |  | 1,300,000 |
Cash payments |  |  | $ 5,700,000 |

X
- Definition Restructuring charges, net of reversals. + References No definition available. + Details
Name: | extr_RestructuringChargesNetOfReversals
Namespace Prefix: | extr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3367-108585 + Details
Name: | us-gaap_PaymentsForRestructuring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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_RestructuringCostAndReserveLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RestructuringPlanAxis=extr_ReductionInForcePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |