Note 19 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Expense	$ 4,394	$ 4,565	$ 3,262
Deferred tax benefit	(924)	(960)	(686)
Total net expense	3,470	3,605	2,576
Stock Appreciation Rights (SARs) [Member]
Expense	376	352	352
Deferred tax benefit	(79)	(74)	(74)
Total net expense	297	278	278
Restricted Stock [Member]
Expense	1,373	1,288	1,346
Deferred tax benefit	(289)	(271)	(283)
Total net expense	1,084	1,017	1,063
Restricted Stock Units (RSUs) [Member]
Expense	332	312	270
Deferred tax benefit	(70)	(66)	(57)
Total net expense	262	246	213
Performance Shares [Member]
Expense	2,313	2,613	1,294
Deferred tax benefit	(486)	(549)	(272)
Total net expense	$ 1,827	$ 2,064	$ 1,022