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Note 7 - Share-based Compensation - Stock-settled Stock Appreciation Rights Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022
Lapsed or cancelled (in shares) |  | (92,457) |
Lapsed or cancelled, weighted average exercise price (in dollars per share) |  | $ 20.77 |
Stock Appreciation Rights (SARs) [Member] |  |  |
Outstanding SARS (in shares) |  | 320,385 |
Outstanding (in dollars per share) |  | $ 15.23 |
Outstanding SARS, weighted average remaining life (Year) |  | 2 years 7 months 28 days | 2 years 2 months 23 days
Outstanding SARS, aggregate intrinsic value |  | $ 4 | $ 69
Granted SARs (in shares) | [1] | 51,209 |
Granted SARS, weighted average exercise price (in dollars per share) |  | $ 12.04 |
Exercised SARs (in shares) |  | 0 |
Exercised SARS, weighted average exercise price (in dollars per share) |  | $ 0 |
Lapsed or cancelled (in shares) |  | (37,243) |
Lapsed or cancelled, weighted average exercise price (in dollars per share) |  | $ 23.59 |
Outstanding SARS (in shares) |  | 334,351 | 320,385
Outstanding SARS, weighted average exercise price (in dollars per share) |  | $ 13.81 | $ 15.23
Exercisable (in shares) |  | 226,088 |
Exercisable, weighted average exercise price (in dollars per share) |  | $ 13.51 |
Exercisable SARS, weighted average remaining life (Year) |  | 1 year 9 months 14 days |
Exercisable, aggregate intrinsic value |  | $ 4 |
[1] | The weighted average grant date fair value of SARs granted was $4.58 per share.

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- Definition The weighted average grant-date fair value of SARS exercised during the reporting period as calculated by applying the disclosed option pricing methodology. + References No definition available. + Details
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- Definition The weighted average exercise price of non-option equity instruments granted during the period. + References No definition available. + Details
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- Definition Weighted average remaining contractual term for vested portions of non-options equity instruments outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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