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Note 10 - Earnings Per Share - Computation of Earnings Per Share Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Net income attributable to Common shareholders $ 2,326 $ 1,323 $ 4,391 $ 3,199
Weighted average shares outstanding (in shares) (3,957,269) (3,947,284) (3,957,010) (3,945,816)
Basic earnings per share (in dollars per share) $ 0.59 $ 0.34 $ 1.11 $ 0.81
Net income attributable to Common shareholders $ 2,326 $ 1,323 $ 4,391 $ 3,199
Effect of potentially dilutive restricted common shares (in shares) (6,439) (1,141) (8,588) (9,019)
Weighted average diluted shares outstanding (in shares) 3,963,708 3,948,425 3,965,598 3,954,835
Diluted earnings per share (in dollars per share) $ 0.59 $ 0.34 $ 1.11 $ 0.81