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Note 16 - Shareholders' Equity - Computation of Income (Loss) Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Net Income (Loss) Attributable to Parent, Total $ 1,900 $ 5,094 $ (3,819) $ (2,817)
Weighted average shares outstanding (in shares)   3,946,384 3,934,886 3,921,783
Basic earnings (loss) per common share (in dollars per share)   $ 1.29 $ (0.97) $ (0.72)
Net income (loss) attributable to Common shareholders   $ 5,094 $ (3,819) $ (2,817)
Effect of potentially dilutive restricted common shares (in shares) [1]   6,270    
Weighted average diluted shares outstanding (in shares)   3,952,654 3,934,886 3,921,783
Diluted earnings (loss) per common share (in dollars per share)   $ 1.29 $ (0.97) $ (0.72)
[1] The weighted average diluted shares outstanding does not include 3,039 anti-dilutive restricted common shares for the year ended December 31, 2020.