Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Income tax refund		$ 2,800,000
Valuation allowance	$ 145,404,000	210,808,000
Interest or penalties related to an uncertain tax position	0
State Tax Audit
Income Taxes [Line Items]
Loss contingency accrual	2,500,000
Maximum | State Tax Audit
Income Taxes [Line Items]
Estimate of possible loss	3,500,000
Federal
Income Taxes [Line Items]
Income taxes paid	0	0
Operating loss carryforwards	383,300,000	$ 900,700,000
State
Income Taxes [Line Items]
Operating loss carryforwards	$ 382,800,000