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Note 9 - Basic and Diluted Earnings Per Common Share - Summary of Basic and Diluted Earnings Per Common Share (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 for the period $ 1,807 $ 157 $ 3,956 $ 2,991
Shares used in computing basic earnings per common share (note 9) (in shares) 10,633,601 10,567,382 10,625,748 10,589,806
Effect of outstanding stock options (in shares) 164,320 86,145 168,775 94,498
Diluted weighted average number of shares outstanding (in shares) 10,797,921 10,653,527 10,794,523 10,684,304
Basic earnings per common share (note 9) (in dollars per share) $ 0.17 $ 0.01 $ 0.37 $ 0.28
Diluted earnings per common share (note 9) (in dollars per share) $ 0.17 $ 0.01 $ 0.37 $ 0.28