Shanghai Adicet Biotechnology Co., Ltd. (the Adicet VIE) (Additional Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Total operating expenses	$ 127,615	$ 152,038
Research and Development Expense, Total	99,323	106,043
General and Administrative Expense, Total	28,292	$ 26,533
Adicet VIE [Member]
Variable Interest Entity [Line Items]
Total operating expenses	1,200
Research and Development Expense, Total	1,100
General and Administrative Expense, Total	$ 100