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Note 3 - Earnings Per Share - Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Net income (loss) $ 1,415 $ 769 $ (2,703) $ (2,404) $ 2,184 $ (5,107)
Weighted average number of common shares outstanding (in shares) 21,091,496   20,244,176   20,980,880 19,977,477
Basic net income (loss) per share (in dollars per share) $ 0.07   $ (0.13)   $ 0.10 $ (0.26)
Non-vested stock awards (1) (in shares) [1] 317,031   0   409,351 0
Weighted average number of common shares outstanding (in shares) 21,408,527   20,244,176   21,390,231 19,977,477
Diluted net income (loss) per share (in dollars per share) $ 0.07   $ (0.13)   $ 0.10 $ (0.26)
[1] Restricted stock units granted and outstanding of 623,191 as of March 31, 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 ended March 31, 2022.