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License and Collaboration Agreements - Additional Information (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
License and Collaboration Agreements [Line Items] |  |  |  |  |  |
Research and collaboration revenue |  |  | $ 43,000 | $ 9,000 | $ 683,000 | $ 203,000
Lepu Biotech Co., Ltd. |  |  |  |  |  |
License and Collaboration Agreements [Line Items] |  |  |  |  |  |
One-time upfront payment |  | $ 4,500,000 |  |  |  |
Collaboration agreement transaction price |  | 4,500,000 |  |  |  |
Research and collaboration revenue |  |  | 0 |  | 500,000 |
Lepu Biotech Co., Ltd. | Maximum |  |  |  |  |  |
License and Collaboration Agreements [Line Items] |  |  |  |  |  |
Regulatory milestone payments |  | 2,500,000 |  |  |  |
Commercial milestone payments |  | $ 57,500,000 |  |  |  |
Research and collaboration revenue |  |  |  | 100,000 |  | 100,000
Kissei Pharmaceutical Co., Ltd. |  |  |  |  |  |
License and Collaboration Agreements [Line Items] |  |  |  |  |  |
One-time upfront payment | $ 10,000,000 |  |  |  |  |
Research and collaboration revenue |  |  | $ 100,000 | $ (0) | $ 200,000 | $ 200,000
Royalties | 0 |  |  |  |  |
Kissei Pharmaceutical Co., Ltd. | Maximum |  |  |  |  |  |
License and Collaboration Agreements [Line Items] |  |  |  |  |  |
Commercial milestone payments | 67,000,000 |  |  |  |  |
Development and regulatory milestone payments | 33,000,000 |  |  |  |  |
Kissei Pharmaceutical Co., Ltd. | Series D Redeemable Convertible Preferred Stock |  |  |  |  |  |
License and Collaboration Agreements [Line Items] |  |  |  |  |  |
Purchase of redeemable convertible preferred stock | $ 30,000,000 |  |  |  |  |

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