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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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