Segment Information - Schedule of Segment Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting [Abstract]
Product revenue, net	$ 180,133,000	$ 0	$ 0
Cost of sales	(6,233,000)	0	0
Research and development - personnel and internal expense	(73,418,000)	(56,824,000)	(39,121,000)
Research and development - external expense	(163,300,000)	(215,526,000)	(206,320,000)
Selling, general and administrative	(435,057,000)	(108,146,000)	(48,130,000)
Other segment income (expense)	31,983,000	6,866,000	(1,779,000)
Net loss	$ (465,892,000)	$ (373,630,000)	$ (295,350,000)