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Note 14 - Share-based Compensation (Tables) | 9 Months Ended
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Mar. 31, 2021
Notes Tables |
Schedule of Share-based Payment Award, Performance Stock Units, Valuation Assumptions [Table Text Block] |
|  | FY 2021 |  |  | FY 2020 |
Volatility |  |  | 56.0 | % |  |  | 30.5 | %
Risk-free rate of return |  |  | 0.14 | % |  |  | 1.72 | %
Dividend yield |  |  | 3.26 | % |  |  | 3.97 | %

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of performance stock units, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References No definition available. + Details
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Namespace Prefix: | eth_
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration