Note 2 - Earnings Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net income	$ 2,082	$ 1,362
Less: Preferred stock dividends
Net income available to common stockholders	$ 2,082	$ 1,362
Average common shares outstanding - basic (in shares)	2,698,712	2,271,139
Add: Dilutive effects of restricted stock awards (in shares)	13,706	14,176
Average shares and dilutive potential common shares (in shares)	2,712,418	2,285,315
Basic earnings per common share (in dollars per share)	$ 0.77	$ 0.60
Diluted earnings per common share (in dollars per share)	$ 0.77	$ 0.60
Restricted stock awards not considered in computing earnings per share because they were antidulitive (in shares)