Income Taxes - Components of Loss Before Income Tax (Benefit) Expense from Discontinuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Loss from Discontinuing Operations Before Income Taxes [Abstract]
Domestic	$ (7,731)	$ (3,996)	$ (489)
Loss before income tax (benefit) expense	$ (7,731)	$ (3,996)	$ (489)