Note 6 - Earnings Per Share - Components Used to Compute Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net income	$ 3,675	$ 2,510	$ 6,524	$ 6,796
Basic weighted average common shares outstanding (in shares)	9,257,252	9,854,973	9,409,754	9,930,069
Dilutive restricted stock grants (in shares)	6,723	48,368	29,484	76,738
Diluted weighted average common shares outstanding (in shares)	9,263,975	9,903,341	9,439,238	10,006,807
Basic earnings per share (in dollars per share)	$ 0.40	$ 0.25	$ 0.69	$ 0.68
Diluted earnings per share (in dollars per share)	$ 0.40	$ 0.25	$ 0.69	$ 0.68