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Shanghai Adicet Biotechnology Co., Ltd. (the Adicet VIE) (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Variable Interest Entity [Line Items]
Expenses	$ 32,392	$ 32,849	$ 62,277	$ 63,719
Research and development Expense	28,424	25,901	51,238	49,797
General and administrative Expense	3,968	$ 6,948	11,039	$ 13,922
Adicet VIE [Member]
Variable Interest Entity [Line Items]
Expenses	1,000		1,500
Research and development Expense	900		1,400
General and administrative Expense	$ 100		$ 100

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- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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