Note 13 - Income Taxes - Income Tax Benefit and Effective Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Federal	$ 0	$ 0	$ 0
State	0	0	0
Total current income tax expense	0	0	0
Federal	63,002	73,026	15,084
State	2,903	2,335	1,820
Deferred income tax expense	65,905	75,361	16,904
Total income tax expense	$ 65,905	$ 75,361	$ 16,904