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Note 2 - Summary of Significant Accounting Policies - Loss Per Basic and Diluted Weighted Average Common Share Outstanding for Continuing and Discontinued Operations (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Net income $ 21,072 $ 31,149 $ 11,523
Basic (in shares) 9,991 9,914 9,854
Effect of potentially dilutive common shares (1) (in shares) [1] 90 98 74
Diluted weighted-average common shares outstanding (in shares) 10,081 10,012 9,928
Net income per common share      
Basic (in dollars per share) $ 2.11 $ 3.14 $ 1.17
Diluted (in dollars per share) $ 2.09 $ 3.11 $ 1.16
[1] There were no antidilutive shares for the years ended December 31, 2023, 2022, or 2021.