XML 82 R70.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Subsequent Event (Narratives) (Details) $ in Thousands |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | ---
Oct. 27, 2017 USD ($) Quarter | Oct. 31, 2017 USD ($) | Sep. 30, 2017 USD ($)
Subsequent Event [Line Items] |  |  |
Upfront cash closing payment |  |  | $ 68,047
Borrowings under Term Loan |  |  | $ 80,000
Brocade SRA | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Business acquisition date | Oct. 27, 2017 |  |
Upfront cash closing payment | $ 23,000 |  |
Deferred payment | 20,000 |  |
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 of Brocade SRA | 50.00% |  |
Quarterly earn out payments period | 5 years |  |
Broadcom, Inc. | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Acquisition fee paid |  | $ 25,000 |
Term Loan | Brocade SRA | Subsequent Event |  |  |
Subsequent Event [Line Items] |  |  |
Borrowings under Term Loan | $ 20,000 |  |

X
- Definition Business combination deferred payment due. + References No definition available. + Details
Name: | extr_BusinessCombinationDeferredPaymentDue
Namespace Prefix: | extr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business combination deferred payment to be paid per quarter. + References No definition available. + Details
Name: | extr_BusinessCombinationDeferredPaymentToBePaidPerQuarter
Namespace Prefix: | extr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business combination number of quarter deferred payment to be paid. + References No definition available. + Details
Name: | extr_BusinessCombinationNumberOfQuarterDeferredPaymentToBePaid
Namespace Prefix: | extr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Business combination quarterly earn out payments in percentage of profits of acquiree. + References No definition available. + Details
Name: | extr_BusinessCombinationQuarterlyEarnOutPaymentsInPercentageOfProfitsOfAcquiree
Namespace Prefix: | extr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Business combination quarterly earn out payments period. + References No definition available. + Details
Name: | extr_BusinessCombinationQuarterlyEarnOutPaymentsPeriod
Namespace Prefix: | extr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Payments for business acquisition fee. + References No definition available. + Details
Name: | extr_PaymentsForBusinessAcquisitionFee
Namespace Prefix: | extr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e845-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e848-128460 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow from bank borrowing during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromBankDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=extr_BrocadeSwitchingRoutingAndAnalyticsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CounterpartyNameAxis=extr_BroadcomIncorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=extr_TermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |