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Income Taxes - Narrative (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal net operating loss carryforwards	$ 70,600,000	$ 60,700,000
State net operating loss carryforwards	48,900,000	43,500,000
Federal tax loss carryforwards, subject to expiration	43,500,000
Federal net operating loss carryforwards, carryforward indefinitely	27,100,000
Tax attribute carryforwards cannot be utilized under IRC Section 382	61,800,000
Unrecognized tax benefits	$ 0	$ 0

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Operating Loss Carryforwards, Not Utilized

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.

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