Note 19 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Expense	$ 4,464	$ 4,394	$ 4,565
Deferred tax benefit	(939)	(924)	(960)
Total net expense	3,525	3,470	3,605
Stock Appreciation Rights (SARs) [Member]
Expense	492	376	352
Deferred tax benefit	(104)	(79)	(74)
Total net expense	388	297	278
Restricted Stock [Member]
Expense	1,599	1,373	1,288
Deferred tax benefit	(336)	(289)	(271)
Total net expense	1,263	1,084	1,017
Restricted Stock Units (RSUs) [Member]
Expense	519	332	312
Deferred tax benefit	(109)	(70)	(66)
Total net expense	410	262	246
Performance Shares [Member]
Expense	1,854	2,313	2,613
Deferred tax benefit	(390)	(486)	(549)
Total net expense	$ 1,464	$ 1,827	$ 2,064