Note 2 - Earnings Per Common Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net income	$ 1,190	$ 2,082
Less: Preferred stock dividends
Net income available to common stockholders	$ 1,190	$ 2,082
Average common shares outstanding - basic (in shares)	2,708,712	2,698,712
Add: Dilutive effects of restricted stock awards (in shares)	14,898	13,706
Average shares and dilutive potential common shares (in shares)	2,723,610	2,712,418
Basic earnings per common share (in dollars per share)	$ 0.44	$ 0.77
Diluted earnings per common share (in dollars per share)	$ 0.44	$ 0.77
Restricted stock awards not considered in computing earnings per share because they were antidulitive (in shares)