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, 2018	Dec. 31, 2017	Dec. 31, 2016
Net Income Available to Common Shares	$ 14,091	$ 4,848	$ 5,111
Weighted Average Common Shares Outstanding (in shares)	11,124,585	7,658,137	7,033,476
Dilutive Effect of Stock Options and Warrants (in shares)	421,358	345,822	281,607
Weighted Average Dilutive Common Shares (in shares)	11,545,943	8,003,959	7,315,083
Basic Earnings Per Common Share From Net Income Available to Common Shares (in dollars per share)	$ 1.27	$ 0.63	$ 0.73
Diluted Earnings Per Common Share From Net Income Available to Common Shares (in dollars per share)	$ 1.22	$ 0.61	$ 0.70