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Note 17 - 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 12 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Net income for the period $ (1,967) $ 1,375 $ 1,807 $ 2,149 $ 2,068 $ 716 $ 157 $ 2,834 $ 3,364 $ 5,775 $ 15,398
Shares used in computing basic earnings per common share (note 17) (in shares)                 10,662,337 10,590,684 10,623,799
Effect of outstanding stock options (in shares)                 155,132 101,597 149,013
Diluted weighted average number of shares outstanding (in shares)                 10,817,468 10,692,281 10,772,812
Basic earnings per common share (note 17) (in dollars per share) $ (0.18) $ 0.13 $ 0.17 $ 0.20 $ 0.19 $ 0.07 $ 0.01 $ 0.27 $ 0.32 $ 0.55 $ 1.45
Diluted earnings per common share (note 17) (in dollars per share) $ (0.18) $ 0.13 $ 0.17 $ 0.20 $ 0.19 $ 0.07 $ 0.01 $ 0.26 $ 0.31 $ 0.54 $ 1.43