Note 4 - Earnings Per Common Share - Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net Income Available to Common Shares	$ 23,772	$ 14,091	$ 4,848
Weighted Average Common Shares Outstanding (in shares)	13,310,577	11,124,585	7,658,137
Dilutive Effect of Stock Options and Warrants (in shares)	360,200	421,358	345,822
Weighted Average Dilutive Common Shares (in shares)	13,670,777	11,545,943	8,003,959
Basic Earnings Per Common Share From Net Income Available to Common Shares (in dollars per share)	$ 1.79	$ 1.27	$ 0.63
Diluted Earnings Per Common Share From Net Income Available to Common Shares (in dollars per share)	$ 1.74	$ 1.22	$ 0.61