Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Collaboration revenue	$ 60,391		$ 126,376
Operating expenses
Research and development	39,803	$ 7,755	66,375	$ 10,576
General and administrative	11,901	2,248	20,658	3,472
Total operating expenses	51,704	10,003	87,033	14,048
Income (loss) from operations	8,687	(10,003)	39,343	(14,048)
Interest income and other, net	52	10	109	67
Income (loss) before income taxes	8,739	(9,993)	39,452	(13,981)
Income tax expense	(7,200)		(7,200)
Net income (loss) and comprehensive income (loss)	$ 1,539	$ (9,993)	$ 32,252	$ (13,981)
Net income (loss) per share attributable to common stockholders
Basic	$ 0.02	$ (0.99)	$ 0.39	$ (1.39)
Diluted	$ 0.02	$ (0.99)	$ 0.36	$ (1.39)
Weighted-average common shares outstanding
Basic	82,743,530	10,096,307	82,662,019	10,093,689
Diluted	88,091,384	10,096,307	88,683,767	10,093,689