Note 12 - Employee Benefit Plans - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Options outstanding at beginning of period (in shares)	204,878
Options outstanding at beginning of period (in dollars per share)	$ 29.35
Granted (in shares)	0
Granted (in dollars per share)	$ 0
Exercised (in shares)	(7,575)	(39,995)
Exercised (in dollars per share)	$ 22.63
Canceled/Expired (in shares)	0
Canceled/Expired (in dollars per share)	$ 0
Options outstanding at end of period (in shares)	197,303	204,878
Options outstanding at end of period (in dollars per share)	$ 29.61	$ 29.35
Options outstanding at end of period (Year)	6 years 8 months 8 days
Options outstanding at end of period	$ 847
Options exercisable at end of period (in shares)	109,833
Options exercisable at end of period (in dollars per share)	$ 26.90
Options exercisable at end of period (Year)	5 years 5 months 23 days
Options exercisable at end of period	$ 769