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Note 5 - Income Taxes - Components of Income Tax Expense Benefit (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Current, federal $ 682 $ (21,005) $ 649
Current, state 0 0 0
Current, non-U.S. 6,480 18,816 26,403
Current, total 7,162 (2,189) 27,052
Deferred, federal (1,418) (30) 672
Deferred, state 0 0 0
Deferred, non-U.S. 131 1,254 0
Deferred, total (1,287) 1,224 672
Federal (736) (21,035) 1,321
State 0 0 0
Non-U.S. 6,611 20,070 26,403
Income Tax Expense (Benefit), Total $ 5,875 $ (965) $ 27,724