Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 85	$ 45	$ 152
State	(12)	(180)	(90)
Foreign	6,596	6,168	10,070
Current Income Tax Expense (Benefit)	6,669	6,033	10,132
Deferred:
Federal	(662)	(26)	(148)
State	0	0	0
Foreign	438	(2,166)	(682)
Deferred Income Tax Expense (Benefit)	(224)	(2,192)	(830)
Income Taxes	$ 6,445	$ 3,841	$ 9,302