Note 6 - Income Taxes - Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
U.S. Federal	$ 13,769	$ (5,933)	$ 15,905
U.S. State	2,145	(2,294)	4,717
Non-U.S.	143	514	1,336
Current Income Tax Expense (Benefit), Total	16,057	(7,713)	21,958
Deferred:
U.S. Federal	(16,657)	10,936	(9,386)
U.S. State	1,897	749	(8,033)
Deferred Income Tax Expense (Benefit), Total	(14,760)	11,685	(17,419)
Total Income Tax Expense	$ 1,297	$ 3,972	$ 4,539