Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 0	$ (6)	$ (44)
State	24	14	12
Total current	24	8	(32)
Deferred:
Federal	68	94	138
State	104	102	54
Foreign	(309)	0	0
Total deferred	(137)	196	192
Income tax expense (benefit)	$ (113)	$ 204	$ 160