Note 13 - Share-based Compensation - Shared-based Compensation Expense and the Related Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Share-based compensation expense	$ 4,289	$ 4,010
Related income tax benefit	804	760
Stock Options and SARs [Member]
Share-based compensation expense	1,472	1,420
Restricted Stock [Member]
Share-based compensation expense	2,598	2,241
Performance Shares [Member]
Share-based compensation expense	$ 219	$ 349