- DefinitionTabular 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.
| Name: |
eth_ScheduleOfSharebasedPaymentAwardPerformanceStockUnitsValuationAssumptionsTableTextBlock |
| Namespace Prefix: |
eth_ |
| Data Type: |
nonnum:textBlockItemType |
| Balance Type: |
na |
| Period Type: |
duration |