XML 56 R39.htm IDEA: XBRL DOCUMENT
v3.21.2

Summary of Significant Accounting Policies (Narratives) (Details) | 12 Months Ended |
--- | --- | ---
Jun. 30, 2021 USD ($) Segment | Jun. 30, 2020 USD ($) | Jul. 01, 2019 USD ($)
Significant Accounting Policies [Line Items] |  |  |
Intangible asset and goodwill impairment | $ 0 | $ 0 |
Number of reporting units | Segment | 1 |  |
Hardware products warranty period (in years) | 1 year |  |
Software products warranty period (in days) | 90 days |  |
Minimum percentage of tax benefit realized upon settlement | 50.00% |  |
Operating lease right-of-use assets, net | $ 36,927,000 | $ 51,274,000 |
Operating lease, liability | $ 51,258,000 |  |
ASU 2016-02 |  |  |
Significant Accounting Policies [Line Items] |  |  |
Operating lease right-of-use assets, net |  |  | $ 64,600,000
Operating lease, liability |  |  | $ 79,500,000
Minimum | Purchased Software |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 1 year |  |
Maximum | Purchased Software |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 4 years |  |
Computer Equipment | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 1 year |  |
Computer Equipment | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 4 years |  |
Office equipment, furniture and fixtures | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 3 years |  |
Office equipment, furniture and fixtures | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of property and equipment | 7 years |  |

X
- Definition Hardware products warranty period. + References No definition available. + Details
Name: | extr_HardwareProductsWarrantyPeriod
Namespace Prefix: | extr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum percentage of tax benefit realized upon settlement. + References No definition available. + Details
Name: | extr_MinimumPercentageOfTaxBenefitRealizedUponSettlement
Namespace Prefix: | extr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Significant Accounting Policies [Line Items] + References No definition available. + Details
Name: | extr_SignificantAccountingPoliciesLineItems
Namespace Prefix: | extr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Software products warranty period. + References No definition available. + Details
Name: | extr_SoftwareProductsWarrantyPeriod
Namespace Prefix: | extr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. + References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment. + References No definition available. + Details
Name: | us-gaap_NumberOfReportingUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201602Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_ComputerSoftwareIntangibleAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=extr_OfficeEquipmentFurnitureAndFixturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |