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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |
U.S. federal corporate income tax rate (percent) | 21.00% |
Net operating loss carryforwards | $ 246.0 | $ 225.0
Market capitalization used in net operating loss analysis | 125.0 |
Limitation on loss carryforward based Section 382 change in ownership | $ 3.0 |

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