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Apexian Sublicense Agreement - Additional Information (Details) - Apexian Sublicense Agreement - USD ($) $ in Millions |  | 3 Months Ended
--- | --- | ---
Jun. 04, 2020 | Mar. 31, 2021
Sublicense Agreement [Abstract] |  |
Stock issued (in shares) |  | 891,422
Development and Regulatory Milestones | Maximum |  |
Sublicense Agreement [Abstract] |  |
Milestone payments | $ 11 |
Sales Milestones | Maximum |  |
Sublicense Agreement [Abstract] |  |
Milestone payments | $ 20 |

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