Income Taxes - Provision for (benefit from) income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
U.S. federal	$ (1,262)	$ 0	$ 0
U.S. state	0	0	0
Foreign	0	0	0
Deferred taxes	(1,262)	0	0
Benefit from income taxes	$ (1,262)	$ 0	$ 0