Income Taxes - Provisions/ Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal	$ 0	$ 0	$ 0
State	107	21	26
Foreign	1,012	472	595
Total current	1,119	493	621
Federal	0	0	0
State	0	0	0
Foreign	(73)	(237)	12
Total deferred	(73)	(237)	12
Provision for income taxes	$ 1,046	$ 256	$ 633

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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