Income Taxes - Provisions for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ (326)	$ 0
State	578	5
Total current	252	5
Deferred:
Federal	0	0
State	0	0
Total deferred	0	0	$ 40
Total provision for income taxes	$ 252	$ 5	$ 13