Note 11 - Earnings Per Share - Calculation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net income for the period	$ 2,635	$ 2,019
Basic weighted-average number of common shares outstanding (in shares)	18,720,502	16,763,401
Plus: Common share equivalents (in shares)	13,150	25,935
Diluted weighted-average number of common shares outstanding (in shares)	18,733,652	16,789,336
Basic (in dollars per share)	$ 0.14	$ 0.12
Diluted (in dollars per share)	$ 0.14	$ 0.12