Note 17 - Stock-based Compensation and Other Benefit Plans - Weighted Average Assumptions (Details) - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
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| Weighted average exercise price - ($/share) (in dollars per share) | $ 6.41 | $ 3.14 | $ 1.23 |
| Expected life in years (Year) | 6 years | 6 years | 6 years |
| Average expected volatility | 72.00% | 75.00% | 74.00% |
| Risk-free interest rate | 1.98% | 0.95% | 0.42% |
| Expected dividend yield | 2.30% | 0.00% | 0.00% |
| Weighted average grant date fair value - ($/share) (in dollars per share) | $ 2.84 | $ 2.07 | $ 0.79 |
| X | ||||||||||
- Definition Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award. No definition available.
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| X | ||||||||||
- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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