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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
Mar. 31, 2021
Mar. 31, 2020
Net income (loss) attributable to Common shareholders $ 854 $ (1,072)
Weighted average shares outstanding (in shares) (3,943,580) (3,931,388)
Basic earnings (loss) per share (in dollars per share) $ 0.22 $ (0.27)
Net income (loss) attributable to Common shareholders $ 854 $ (1,072)
Effect of potentially dilutive restricted common shares (in shares) (1,540) [1]
Weighted average diluted shares outstanding (in shares) 3,945,120 3,931,388
Diluted earnings (loss) per share (in dollars per share) $ 0.22 $ (0.27)
[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.