Note 13 - Income Taxes - Income Tax Benefit and Effective Tax Rate (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Federal	$ 0	$ 0	$ 0	$ 0
State	0	0	0	0
Total current income tax expense (benefit)	0	0	0	0
Federal	23,315,000	1,420,000	23,127,000	2,535,000
State	757,000	0	633,000	0
Deferred income tax expense (benefit)	24,072,000	1,420,000	23,760,000	2,535,000
Total income tax expense (benefit)	$ 24,072,000	$ 1,420,000	$ 23,760,000	$ 2,535,000