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Note 14 - Earnings Per Common Share - Basic and Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Net income $ 8,858 $ 9,556
Weighted average shares outstanding – basic (in shares) 4,878,139 4,964,832
Potentially dilutive common shares – restricted stock units (in shares) 2,127 3,100
Weighted average shares outstanding – diluted (in shares) 4,880,266 4,967,932
Income per common share    
Basic (in dollars per share) $ 1.82 $ 1.92
Diluted (in dollars per share) $ 1.82 $ 1.92