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Note 17 - Earnings Per Common Share - 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, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Net income for the period $ 2,068 $ 716 $ 157 $ 2,834 $ 5,778 $ 4,205 $ 2,616 $ 2,799 $ 5,775 $ 15,398 $ 17,135 [1],[2]
Shares used in computing basic earnings per common share (note 17) (in shares)                 10,590,684 10,623,799 10,604,722 [1]
Effect of outstanding stock options (in shares)                 101,597 149,013 189,448
Shares used in computing diluted earnings per common share (note 17) (in shares)                 10,692,281 10,772,812 10,794,170 [1]
Basic earnings per common share (note 17) (in dollars per share) $ 0.19 $ 0.07 $ 0.01 $ 0.27 $ 0.55 $ 0.40 $ 0.25 $ 0.26 $ 0.55 $ 1.45 $ 1.62 [1]
Diluted earnings per common share (note 17) (in dollars per share) $ 0.19 $ 0.07 $ 0.01 $ 0.26 $ 0.54 $ 0.39 $ 0.24 $ 0.26 $ 0.54 $ 1.43 $ 1.59 [1]
[1] The Company has initially applied ASC 2016-02 (Topic 842) on January 1, 2019 (note 2 (u)). The accounting standard was adopted using the modified retrospective method, under this method the comparative period was not restated.
[2] The Company has initially applied ASC 2016-02 (Topic 842) on January 1, 2019 (note 2(u)). The accounting standard was adopted using the modified retrospective method, under this method the comparative period was not restated.