Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Collaboration revenue		$ 351,367	$ 48,633
Operating expenses
Research and development expense	$ 81,936	167,205	38,023
General and administrative	48,714	45,785	21,640
Total operating expenses	130,650	212,990	59,663
Income (loss) from operations	(130,650)	138,377	(11,030)
Interest income and other, net	11,151	213	83
Income (loss) before income taxes	(119,499)	138,590	(10,947)
Income tax benefit (expense)	3,590	(17,400)
Net income (loss)	(115,909)	121,190	(10,947)
Other comprehensive income (loss)
Unrealized loss on available-for-sale investments	(684)
Comprehensive income (loss)	$ (116,593)	$ 121,190	$ (10,947)
Net income (loss) per share attributable to common stockholders
Basic	$ (1.39)	$ 1.46	$ (0.51)
Diluted	$ (1.39)	$ 1.37	$ (0.51)
Weighted-average number of common shares used in computing net income (loss) per share attributable to common stockholders
Basic	83,245,385	82,820,037	21,592,441
Diluted	83,245,385	88,249,243	21,592,441