Note 11 - Stock-based Compensation - Vesting Terms of Options Granted (Details) - shares shares in Thousands  | 
9 Months Ended | |
|---|---|---|
Sep. 30, 2024  | 
Sep. 30, 2023  | 
|
| Stock options granted in the period (in shares) | 408 | 217 | 
| Options with Three Year Vesting [Member] | ||
| Stock options granted in the period (in shares) | 20 | 48 | 
| Options with Four Year Vesting [Member] | ||
| Stock options granted in the period (in shares) | 388 | 169 | 
| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
- Details 
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| X | ||||||||||
- Details 
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