Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues:
Revenues	$ 66,769	$ 249	$ 68,348	$ 1,084
Operating expenses:
Research and development	112,554	79,597	212,395	161,167
General and administrative	65,721	50,824	123,090	96,324
Total operating expenses	178,275	130,421	335,485	257,491
Operating loss	(111,506)	(130,172)	(267,137)	(256,407)
Interest expense	(11,084)	(12,732)	(19,952)	(19,835)
Non-cash interest expense on liabilities related to revenue participation right purchase agreements	(13,181)	(11,567)	(27,259)	(21,785)
Interest and other income, net	13,001	11,553	26,702	19,466
Change in fair value of derivative liabilities	3,000	(600)	2,600	(600)
Change in fair value of liabilities related to RPI Transactions	(14,600)	200	(10,700)	200
Net loss	$ (134,370)	$ (143,318)	$ (295,746)	$ (278,961)
Net loss per share - basic	$ (1.12)	$ (1.31)	$ (2.49)	$ (2.63)
Net loss per share - diluted	$ (1.12)	$ (1.31)	$ (2.49)	$ (2.63)
Weighted-average number of shares used in computing net loss per share - basic	119,457	109,240	118,979	106,013
Weighted-average number of shares used in computing net loss per share - diluted	119,457	109,240	118,979	106,013
Other comprehensive (loss) gain:
Unrealized loss on available-for-sale securities, net	$ (851)	$ (499)	$ (1,392)	$ (1,055)
Foreign currency translation adjustments	(852)	16	(1,164)	43
Comprehensive loss	(136,073)	(143,801)	(298,302)	(279,973)
Collaboration Revenues [Member]
Revenues:
Revenues	2,416	249	3,995	1,084
License and Milestone Revenues [Member]
Revenues:
Revenues	$ 64,353	$ 0	$ 64,353	$ 0