Condensed Consolidated Statements of Operations and Comprehensive Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues:
Total revenues	$ 26,759	$ 9,461	$ 44,764	$ 18,922
Operating expenses:
Research and development (($36,327), ($1,176), ($66,626) and ($6,100) from a related party)	69,905	68,771	131,116	135,158
General and administrative (($99), $0, ($197) and $0 from a related party)	25,836	16,826	49,810	32,647
Total operating expenses	95,741	85,597	180,926	167,805
Loss from operations	(68,982)	(76,136)	(136,162)	(148,883)
Non-operating income (expense):
Interest and other income, net	2,861	166	3,443	320
Effective interest on liability for sale of future royalties	(511)		(902)
Total non-operating income, net	2,350	166	2,541	320
Net loss before income taxes	(66,632)	(75,970)	(133,621)	(148,563)
Income tax expense	0	0	(1,004)	0
Net loss	(66,632)	(75,970)	(134,625)	(148,563)
Other comprehensive loss	(2,584)	(44)	(5,983)	(90)
Comprehensive loss	$ (69,216)	$ (76,014)	$ (140,608)	$ (148,653)
Net loss per share, basic and diluted	$ (0.93)	$ (1.09)	$ (1.88)	$ (2.17)
Weighted-average number of shares used to compute basic and diluted net loss per share	71,814,232	69,745,297	71,506,216	68,421,086
License and Development Services Revenue
Revenues:
Total revenues	$ 16,693		$ 24,632
Other Collaboration Revenue
Revenues:
Total revenues	$ 10,066	$ 9,461	$ 20,132	$ 18,922