Note 11 - Stock-based Compensation - Vesting and Redemption of the RSUs Granted (Details) - $ / shares |
3 Months Ended | |
|---|---|---|
Mar. 31, 2023 |
Mar. 31, 2022 |
|
| Number of options, Granted | 570,000 | 0 |
| Number of options, Vested and redeemed | (570,000) | |
| Weighted average grant date fair value, Granted | $ 0.66 | |
| Restricted Stock Units (RSUs) [Member] | ||
| Number of options, Beginning Balance | 0 | 0 |
| Number of options, Granted | 0 | |
| Number of options, Vested and redeemed | 0 | |
| Number of options, Ending Balance | 0 | 0 |
| Weighted average grant date fair value, Beginning Balance | $ 0 | $ 0 |
| Weighted average grant date fair value, Granted | 0.66 | 0 |
| Weighted average grant date fair value, Vested and redeemed | 0.66 | 0 |
| Weighted average grant date fair value, Ending Balance | $ 0 | $ 0 |
| X | ||||||||||
- Definition Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested and redeemed in period. No definition available.
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| X | ||||||||||
- Definition Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested and redeemed in period, weighted average grant date fair value. No definition available.
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| X | ||||||||||
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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