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, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018		Dec. 31, 2017
Net income for the period	$ 5,778	$ 4,205	$ 2,616	$ 2,799	$ 4,436	$ 5,346	$ 3,608	$ 3,744	$ 15,398	$ 17,135	[1],[2]	$ 22,327
Basic weighted average number of common shares outstanding (in shares)									10,623,799	10,604,722	[2]	10,537,356
Effect of outstanding stock options (in shares)									149,013	189,448		256,266
Diluted weighted average number of shares outstanding (in shares)									10,772,812	10,794,170	[2]	10,793,622
Basic earnings per common share (in dollars per share)	$ 0.55	$ 0.40	$ 0.25	$ 0.26	$ 0.42	$ 0.50	$ 0.34	$ 0.35	$ 1.45	$ 1.62	[2]	$ 2.12
Diluted earnings per common share (in dollars per share)	$ 0.54	$ 0.39	$ 0.24	$ 0.26	$ 0.41	$ 0.50	$ 0.33	$ 0.35	$ 1.43	$ 1.59	[2]	$ 2.07

[1] The Company has initially applied ASC 2014-09 (Topic 606) on January 1, 2018 and ASC 2016-02 (Topic 842) on January 1, 2019. Both accounting standards were adopted using the modified retrospective method, under this method the comparative periods were not restated.

[2] The Company has initially applied ASC 2016-02 (Topic 842) on January 1, 2019 using the modified retrospective method (note 2(v)). Under this method, the comparative information is not restated.