Income Taxes - Net Operating Loss Carryforwards (Details) - USD ($) $ in Thousands	12 Months Ended		24 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2017
Operating loss carryforwards
Valuation allowance	$ 16,960	$ 15,815	$ 16,960
Increase in valuation allowance	1,100	$ 11,000
Federal
Operating loss carryforwards
Net operating loss carryforwards	$ 44,100		44,100	$ 7,500
Operating losses incurred			$ 36,600