Note 16 - Employee Benefits - Summary of Activity In Stock Option Plans (Details) - Employee Stock Option and Stock Appreciation Rights [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Outstanding, shares (in shares)	473,212	491,792	329,203
Outstanding, Weighted- Average Exercise Price (in dollars per share)	$ 21.36	$ 21.32	$ 20.47
Granted, shares (in shares)	176,384	0	177,489
Granted, Weighted- Average Exercise Price (in dollars per share)	$ 26.37	$ 0	$ 21.85
Exercised, shares (in shares)	(10,000)	(18,580)	(14,900)
Exercised, Weighted- Average Exercise Price (in dollars per share)	$ 12.01	$ 20.21	$ 8.92
Forfeited, shares (in shares)	(45,035)	0	0
Forfeited, Weighted- Average Exercise Price (in dollars per share)	$ 23.99	$ 0	$ 0
Expired, shares (in shares)	0	0	0
Expired, Weighted- Average Exercise Price (in dollars per share)	$ 0	$ 0	$ 0
Outstanding, shares (in shares)	594,561	473,212	491,792
Outstanding, Aggregate Intrinsic Value	$ 4,686
Outstanding, Remaining Contractual Term (Year)	6 years 2 months 1 day
Outstanding, Weighted- Average Exercise Price (in dollars per share)	$ 22.81	$ 21.36	$ 21.32
Exercisable, shares (in shares)	290,418	259,037	204,116
Exercisable, Aggregate Intrinsic Value	$ 2,839	$ 1,262	$ 1,683
Exercisable, Remaining Contractual Term (Year)	4 years 1 month 13 days	4 years 6 months 25 days	4 years 9 months 21 days
Exercisable, Weighted- Average Exercise Price (in dollars per share)	$ 20.92	$ 20.33	$ 19.2