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Income Taxes - Narrative (Details) - USD ($) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Apr. 21, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Income Taxes [Line Items] |  |  |
U.S. federal corporate income tax rate (percent) |  | 21.00% |
Market capitalization used in net operating loss analysis |  | $ 125.0 |
Annual limitation on usage of net operating losses |  | 3.0 |
Sale Of Net Operating Losses, NJEDA Program, Value | $ 11.5 |  |
Proceeds From Sale Of Net Operating Losses, NJEDA Program | $ 10.9 |  |
Federal |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carryforwards |  | 264.0 | $ 246.0
State | New Jersey |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carryforwards |  | 99.0 | 187.0
State | California |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carryforwards |  | 70.0 | 70.0
State | New York |  |  |
Income Taxes [Line Items] |  |  |
Net operating loss carryforwards |  | $ 13.0 | $ 13.0

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