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Note 5 - Earnings Per Common Share - Basic and Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Net income $ 3,505 $ 3,835 $ 7,354 $ 7,564
Weighted average shares outstanding – basic (in shares) 6,269,668 6,250,329 6,271,779 6,244,682
Potentially dilutive common shares – restricted stock units (in shares) 7,493 7,149 7,348 5,991
Weighted average shares outstanding – diluted (in shares) 6,277,161 6,257,478 6,279,127 6,250,673
Basic (in dollars per share) $ 0.56 $ 0.61 $ 1.17 $ 1.21
Diluted (in dollars per share) $ 0.56 $ 0.61 $ 1.17 $ 1.21