Note 12 - Earnings Per Common Share - Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Weighted average number of common shares outstanding used in basic earnings per common share calculation (in shares)	4,625,908	4,598,234
Restricted stock awards and options (in shares)	27,718	28,503
Weighted average number of shares outstanding adjusted for effect of dilutive securities (in shares)	4,653,626	4,626,737
Net income	$ 1,385	$ 1,620
Basic earnings per share (in dollars per share)	$ 0.30	$ 0.35
Diluted earnings per share (in dollars per share)	$ 0.30	$ 0.35