Note 12 - Earnings Per Common Share - Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Weighted average number of common shares outstanding used in basic earnings per common share calculation (in shares)	4,348,444	4,432,447	4,366,672	4,494,761
Net dilutive effect of: Restricted stock awards and options (in shares)	30,652	33,421	32,651	33,122
Weighted average number of shares outstanding adjusted for effect of dilutive securities (in shares)	4,379,096	4,465,868	4,399,323	4,527,883
Net income	$ 1,831	$ 3,619	$ 5,607	$ 11,565
Basic earnings per common share (in dollars per share)	$ 0.42	$ 0.82	$ 1.28	$ 2.57
Diluted earnings per common share (in dollars per share)	$ 0.42	$ 0.81	$ 1.27	$ 2.55