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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income for the period	$ 1,375	$ 716	$ 5,331	$ 3,707
Shares used in computing basic earnings per common share (note 9) (in shares)	10,679,309	10,577,731	10,643,798	10,585,785
Effect of outstanding stock options (in shares)	140,407	105,077	156,563	93,377
Diluted weighted average number of shares outstanding (in shares)	10,819,716	10,682,808	10,800,361	10,679,162
Basic earnings per common share (note 9) (in dollars per share)	$ 0.13	$ 0.07	$ 0.50	$ 0.35
Diluted earnings per common share (note 9) (in dollars per share)	$ 0.13	$ 0.07	$ 0.49	$ 0.35