Note 2 - Earnings Per Share - 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 available to common stockholders	$ 1,948	$ 3,924	$ 6,718	$ 8,282
Basic and diluted weighted average common shares outstanding (in shares)	14,842,150	15,373,964	15,008,271	15,679,927
Basic and diluted earnings per common share (in dollars per share)	$ 0.13	$ 0.26	$ 0.45	$ 0.53