Note 12 - Earnings Per Common Share - Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Weighted average number of common shares outstanding used in basic earnings per common share calculation (in shares)	4,360,717	4,492,502	4,375,936	4,526,434
Restricted stock awards and options (in shares)	33,442	34,394	33,662	32,983
Weighted average number of shares outstanding adjusted for effect of dilutive securities (in shares)	4,394,159	4,526,896	4,409,598	4,559,417
Net income	$ 2,289	$ 4,528	$ 3,776	$ 7,946
Basic earnings per common share (in dollars per share)	$ 0.52	$ 1.01	$ 0.86	$ 1.76
Diluted earnings per common share (in dollars per share)	$ 0.52	$ 1.00	$ 0.86	$ 1.74