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Income Taxes - Narrative (Details) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Tax Credit Carryforward [Line Items] |  |
Accrued interest and penalties related to income tax matters | $ 0 | $ 0
Federal |  |
Tax Credit Carryforward [Line Items] |  |
NOL carryforwards | 273,776,000 |
Operating loss carryforwards, subject to expiration | 72,579,000 |
Operating loss carryforwards, not subject to expiration | 201,197,000 |
Federal | R&D |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforwards | 2,929,000 |
State |  |
Tax Credit Carryforward [Line Items] |  |
NOL carryforwards | 169,332,000 |
State | R&D |  |
Tax Credit Carryforward [Line Items] |  |
Tax credit carryforwards | $ 2,918,000 |

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