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Income Taxes - Additional Information (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Income Tax Disclosure [Abstract] |  |
Provision for income taxes | $ 0 |
Net operating loss carryforwards | 233,600,000 |
Research and experimentation tax carryforwards | $ 3,600,000 |
Description of tax credit carryforward expiration | expire beginning in 2026 |
Valuation allowance, deferred tax asset, explanation of change | Company does not believe it is more likely than not that it will realize the benefits of net deferred tax assets and, accordingly, has established a valuation allowance equal to 100% of net deferred tax assets. |
Percentage of valuation allowance equal to net deferred tax assets | 100.00% |
Increase in valuation allowance | $ 4,900,000 | $ 7,000,000.0
Accrued interest related to uncertain tax positions | $ 0 | $ 0
Income tax examination details | All years will remain open for examining by federal and state authorities for three and four years, respectively, from the date of utilization of any net operating loss carryforwards. |

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