Note 11 - Income Taxes - Reconciliation of Unrecognized Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Unrecognized tax benefits at beginning of year	$ 8,925	$ 5,140
Increases related to current year tax positions	1,575	2,055
Increases related to prior year tax positions	1,129	1,730
Decreases related to prior year tax positions	(1,459)	0
Unrecognized tax benefits at beginning of year	$ 10,170	$ 8,925