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Note 10 - Earnings (Loss) Per Share - Computation of Earnings Per Share Basic and Diluted (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Net income (loss) attributable to Common shareholders $ 1,022 $ (1,278) $ 1,876 $ (2,350)
Weighted average shares outstanding (in shares) (3,946,544) (3,935,109) (3,945,070) (3,933,249)
Basic earnings (loss) per share (in dollars per share) $ 0.26 $ (0.32) $ 0.48 $ (0.60)
Net income (loss) attributable to Common shareholders $ 1,022 $ (1,278) $ 1,876 $ (2,350)
Effect of potentially dilutive restricted common shares (in shares) (11,351) 0 [1] (8,924) 0
Weighted average diluted shares outstanding (in shares) 3,957,895 3,935,109 3,953,994 3,933,249
Diluted earnings (loss) per share (in dollars per share) $ 0.26 $ (0.32) $ 0.47 $ (0.60)
[1] The weighted average diluted shares outstanding does not include 10,112 anti-dilutive restricted common shares for the three months ended March 31, 2020.