Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Income taxes paid	$ 0	$ 0
Income tax refund	2,800,000
Valuation allowance	210,808,000	174,497,000
Interest or penalties related to an uncertain tax position	0
Federal
Income Taxes [Line Items]
Income taxes paid	0	0
Operating loss carryforwards	900,700,000
State
Income Taxes [Line Items]
Operating loss carryforwards, valuation allowance		$ 174,500,000
Operating loss carryforwards	$ 341,400,000