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Note 3 - Earnings Per Share - Earnings Per 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 (loss) $ 4,394 $ 1,415 $ 769 $ (1,772) $ (2,703) $ (2,404) $ 6,578 $ (6,879)
Weighted average number of common shares outstanding (in shares) 21,336,957     20,505,884     21,100,876 20,155,548
Basic net income (loss) per share (in dollars per share) $ 0.21     $ (0.09)     $ 0.31 $ (0.34)
Non-vested stock awards (1) (in shares) [1] 237,054     0     350,197 0
Weighted average number of common shares outstanding (in shares) 21,574,011     20,505,884     21,451,073 20,155,548
Diluted net income (loss) per share (in dollars per share) $ 0.2     $ (0.09)     $ 0.31 $ (0.34)
[1] Restricted stock units granted and outstanding of 811,342 as of September 30, 2022, are excluded from the computation of diluted earnings due to the anti-dilutive effect as a result of the Company’s net loss for the three months and nine months ended September 30, 2022.