Note 18 - Earnings Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 6,748	$ 7,954
Preferred stock dividends	186	182
Net income available to common stockholders	$ 6,562	$ 7,772
Average common shares outstanding (in shares)	2,709,532	2,699,397
Add: Dilutive effects of restricted stock awards (in shares)	17,815	19,349
Average shares and dilutive potential common shares (in shares)	2,727,347	2,718,746
Basic (in dollars per share)	$ 2.42	$ 2.88
Diluted (in dollars per share)	$ 2.41	$ 2.86