Note 11 - Earnings Per Common Share - Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Weighted average number of common shares outstanding used in basic earnings per common share calculation (in shares)	4,236,861	4,203,587
Restricted stock awards, options and warrants (in shares)	665,389	653,929
Weighted average number of shares outstanding adjusted for effect of dilutive securities (in shares)	4,902,250	4,857,516
Income available to common shareholders	$ 1,445	$ 1,216
Basic earnings per common share (in dollars per share)	$ 0.34	$ 0.29
Diluted earnings per common share (in dollars per share)	$ 0.29	$ 0.25