Note 11 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Federal income tax expense at statutory rate	$ 15,517	$ 6,139	$ 9,946
State taxes, net of federal benefit	2,295	762	1,445
Valuation allowance	(495)	(67)	(1,202)
Change in uncertain tax positions, net	540	225	356
Research and development credit	(704)	(1,012)	(1,333)
Investment tax credit	0	(682)	0
State rate change	(165)	92	(168)
Other	752	54	(292)
Income Tax Expense (Benefit)	$ 17,740	$ 5,511	$ 8,752