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Note 11 - Earnings Per Share - Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2023
Sep. 30, 2022
Net income $ 2,776 $ (9,859) $ 21,081 $ 15,780 $ (3,104) $ (12,398) $ 13,998 $ 278
Weighted average shares outstanding – basic (in shares) 43,763,243     43,763,243     43,763,243 43,763,243
Stock options and other awards (in shares) 2,466     0     1,920 0
Weighted average shares outstanding – diluted (in shares) 43,765,709     43,763,243     43,765,163 43,763,243
Basic (in dollars per share) $ 0.06     $ 0.36     $ 0.32 $ 0.01
Diluted (in dollars per share) $ 0.06     $ 0.36     $ 0.32 $ 0.01