Income Taxes - Components of Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Foreign	$ 183	$ 22	$ 304
State and local	110	204	113
Total current expense (benefit) for income taxes	293	226	417
Deferred:
Federal	119	136	162
Foreign	(507)	(320)	116
State and local	(263)	(115)	82
Total deferred expense (benefit) for income taxes	(651)	(299)	360
Total expense (benefit) for income taxes	$ (358)	$ (73)	$ 777