Summary of Significant Accounting Policies - The Chief Operating Decision Maker (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
Revenue		$ 128,940	$ 8,573
Less:
Cost of commercialization revenue		21,009	8,886
Platform sciences, development and operations expense		77,444	122,940
Medical and safety expense		44,138	67,445
Regulatory and quality expense		29,901	34,400
General and administrative expense		(39,886)	(50,908)
Other segment items	[1]	1,965	120
Net loss		$ (85,403)	$ (276,126)

[1] Other segment items include Other Income (expense), net and Provision for (benefit from) income taxes