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Note 12 - Income Taxes (Detail) - Schedule Of Deferred Tax Assets Expiration With Respect To Net Operating Losses (USD $) In Thousands, unless otherwise specified | 228 Months Ended | 36 Months Ended
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Jun. 30, 2031 Domestic Tax Authority [Member] | Jun. 30, 2031 Foreign Tax Authority [Member]
Deferred Income Tax Assets | $ 2,702 | $ 364
Net Operating Loss Carryforwards | $ 57,847 | $ 1,334

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
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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