Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Current:
State	$ 1	$ 1
Total current provision	1	1
Deferred:
Federal	(2,634)	(1,307)
State	(148)	(2,428)
Total deferred (benefit) expense	(2,782)	(3,735)
Valuation allowance	2,781	3,734
Total income tax provision	$ 0	$ 0