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Shanghai Adicet Biotechnology Co., Ltd. (the Adicet VIE) (Additional Information) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Variable Interest Entity [Line Items] |  |
Expenses | $ 29,885 | $ 30,871
Research and development Expense | 22,814 | 23,897
General and administrative Expense | 7,071 | $ 6,974
Adicet VIE [Member] |  |
Variable Interest Entity [Line Items] |  |
Expenses | 500 |
Research and development Expense | 400 |
General and administrative Expense | $ 100 |

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