Note 10 - Share-based Compensation - Summary of Activity In Stock Option Plans (Details) - Employee Stock Option and Stock Appreciation Rights [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Outstanding, shares (in shares)	594,561	473,212
Outstanding, Weighted- Average Exercise Price (in dollars per share)	$ 22.81	$ 21.36
Granted, shares (in shares)	0	176,384
Granted, Weighted- Average Exercise Price (in dollars per share)	$ 0	$ 26.37
Exercised, shares (in shares)	(500)	(1,000)
Exercised, Weighted- Average Exercise Price (in dollars per share)	$ 12.01	$ 12.01
Forfeited, shares (in shares)	0	0
Forfeited, Weighted- Average Exercise Price (in dollars per share)	$ 0	$ 0
Expired, shares (in shares)	0	0
Expired, Weighted- Average Exercise Price (in dollars per share)	$ 0	$ 0
Outstanding, shares (in shares)	594,061	648,596
Outstanding, Aggregate Intrinsic Value	$ 2,580	$ 740
Outstanding, Remaining Contractual Term (Year)	5 years 11 months 1 day	6 years 10 months 9 days
Outstanding, Weighted- Average Exercise Price (in dollars per share)	$ 22.82	$ 22.74
Exercisable, shares (in shares)	347,396	288,517
Exercisable, Aggregate Intrinsic Value	$ 1,909	$ 740
Exercisable, Remaining Contractual Term (Year)	4 years 4 months 13 days	4 years 5 months 19 days
Exercisable, Weighted- Average Exercise Price (in dollars per share)	$ 21.66	$ 20.78