Note 13 - Earnings Per Share - Reconciliation of Basic and Diluted Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 8,161	$ 10,969
Weighted average common shares outstanding (in shares)	8,919,602	8,873,071
Earnings per share (in dollars per share)	$ 0.91	$ 1.24
Effect of dilutive potential common shares: stock options (in shares)	95,000	95,000
Total (in shares)	9,014,985	8,967,901
Earnings per share (in dollars per share)	$ 0.91	$ 1.22