Note 12 - Share-based Compensation - Stock Option Activity (Details) - Share-Based Payment Arrangement, Option [Member] - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2023 |
Dec. 31, 2022 |
|
| Balances at December 31, 2022 (in shares) | 2,782,248 | |
| Balances at December 31, 2022 (in dollars per share) | $ 4.12 | |
| Balances at December 31, 2022 | $ 0 | $ 17 |
| Granted (in shares) | 0 | |
| Granted (in dollars per share) | $ 0 | |
| Expired/cancelled (in shares) | 0 | |
| Expired/cancelled (in dollars per share) | $ 0 | |
| Forfeited (in shares) | (8,750) | |
| Forfeited (in dollars per share) | $ 10.04 | |
| Balances at March 31, 2023 (in shares) | 2,773,498 | |
| Balances at March 31, 2023 (in dollars per share) | $ 4.10 |
| X | ||||||||||
- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| 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 | ||||||||||
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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