Income Tax - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current provision:
Federal	$ 0	$ 0	$ 0
State	50	0	98
Foreign	5,148	8,173	126
Total current provision for income taxes	5,198	8,173	224
Deferred provision:
Federal	0	0	0
State	0	0	0
Foreign	(690)	82	(6)
Total deferred provision for income taxes	(690)	82	(6)
Total provision for income taxes	$ 4,508	$ 8,255	$ 218