Income Taxes - Total Loss Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
U.S.	$ (20,285)	$ (44,163)	$ (40,985)
Foreign	2,084	1,506	1,388
Loss before income taxes	$ (18,201)	$ (42,657)	$ (39,597)

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details