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Note 13 - Income Taxes - Deferred Tax Assets Expiration With Respect to Net Operating Losses (Details) - Domestic Tax Authority [Member] $ in Thousands | 12 Months Ended
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Jun. 30, 2022 USD ($)
Various U.S. state net operating losses, expiring between 2025 and 2040 | $ 340
Net Operating Loss Carryforwards | $ 3,953

X
- Definition Amounts associated with deferred tax benefits on net operating losses for foreign taxing jurisdictions that are subject to expiration + References No definition available. + Details
Name: | eth_DeferredIncomeTaxAssetsSubjectToExpire
Namespace Prefix: | eth_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amounts associated with deferred tax benefits on net operating losses for foreign taxing jurisdictions that are subject to expiration. + References No definition available. + Details
Name: | eth_NetOperatingLossCarryforwardsSubjectToExpire
Namespace Prefix: | eth_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_DomesticCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |