Segment Information - Summary of Significant Segment Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting [Abstract]
Revenue	$ 0	$ 1,788	$ 4,288	$ 6,311
Research and development program expense
Program expense	14,366	4,673	26,737	20,159
Consultants and contractors expense	2,913	3,662	9,385	11,756
Compensation expense	11,111	9,283	33,231	26,707
Other segment expense	4,343	9,694	16,079	18,202
Consolidated net loss	$ (32,733)	$ (25,524)	$ (81,144)	$ (70,513)