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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
 9 Months Ended 12 Months Ended
Sep. 30, 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) 3 years 2 years 6 months
Outstanding, Aggregated intrinsic value $ 225 $ 316
Granted (in shares) 10,600,000  
Granted, weighted average exercise price (in dollars per share) $ 19.61  
Exercised, Number of shares (in shares) (26,000)  
Exercised, Weighted average exercise price (in dollars per share) $ 14.77  
Outstanding, Number of shares (in shares) 84,025 99,425
Outstanding, Weighted average exercise price (in dollars per share) $ 22.45 $ 20.74
Exercisable, Number of shares (in shares) 59,260  
Exercisable, Weighted average exercise price (in dollars per share) $ 23.15  
Exercisable, Weighted average remaining contractual term (Year) 1 year 8 months 12 days  
Exercisable, Aggregated intrinsic value $ 141