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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 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Net income/(loss) for the period $ (7,981) $ 1,375 $ (14,126) $ 5,331
Shares used in computing basic earnings per common share (note 9) (in shares) 10,779,348 10,679,309 10,766,657 10,643,798
Effect of outstanding stock options (in shares) 0 140,407 0 156,563
Diluted weighted average number of shares outstanding (in shares) 10,779,348 10,819,716 10,766,657 10,800,361
Basic earnings/(loss) per common share (note 9) (in dollars per share) $ (0.74) $ 0.13 $ (1.31) $ 0.50
Diluted earnings/(loss) per common share (note 9) (in dollars per share) $ (0.74) $ 0.13 $ (1.31) $ 0.49