Income Taxes - Components of Benefit from Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Current
U.S. Federal	$ 0	$ 0
State and local	0	0
Total current income tax provision (benefit)	0	0
Deferred
U.S. Federal	0	0
State and local	(10,872)	0
Total deferred income tax provision (benefit)	(10,872)	0
Total
U.S. Federal	0	0
State and local	(10,872)	0
Tax provision (benefit)	$ (10,872)	$ 0