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Note 11 - Common Stock and Stock-based Compensation Plans - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Outstanding, Number of shares (in shares) | 99,425 |
Outstanding, Weighted average exercise price (in dollars per share) | $ 20.74 |
Outstanding, Weighted average remaining contractual term (Year) | 2 years 7 months 6 days | 2 years 6 months
Outstanding, Aggregated intrinsic value | $ 213 | $ 316
Exercised, Number of shares (in shares) | (13,000) |
Exercised, Weighted average exercise price (in dollars per share) | $ 14.77 |
Outstanding, Number of shares (in shares) | 86,425 | 99,425
Outstanding, Weighted average exercise price (in dollars per share) | $ 21.64 | $ 20.74
Exercisable, Number of shares (in shares) | 67,000 |
Exercisable, Weighted average exercise price (in dollars per share) | $ 21.64 |
Exercisable, Weighted average remaining contractual term (Year) | 1 year 6 months |
Exercisable, Aggregated intrinsic value | $ 192 |

X
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X
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- Definition Number of share options and SARs exercisable. + References No definition available. + Details
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- Definition Represents the weighted average remaining contractual term of options and SARs outstanding. + References No definition available. + Details
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