Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Condensed Consolidated Statements of Operations and Comprehensive Income (Loss)
Collaboration revenue	$ 41,086	$ 1,482	$ 42,457	$ 9,342
Operating expenses:
Research and development	19,337	17,914	46,213	59,767
General and administrative	7,307	8,714	22,518	28,895
Total operating expenses	26,644	26,628	68,731	88,662
Operating income (loss)	14,442	(25,146)	(26,274)	(79,320)
Other income, net:
Interest income	545	121	816	253
Other income (expensive)	2,637	(112)	2,676	2,161
Total other income, net	3,182	9	3,492	2,414
Net income (loss)	17,624	(25,137)	(22,782)	(76,906)
Other comprehensive income (loss)
Net unrealized (loss) gain on available-for-sale securities	27	(2)	(199)	6
Total other comprehensive income (loss)	27	(2)	(199)	6
Comprehensive income (loss)	$ 17,651	$ (25,139)	$ (22,981)	$ (76,900)
Net income (loss) per share, basic	$ 0.46	$ (0.67)	$ (0.59)	$ (2.04)
Net income (loss) per share, diluted	$ 0.45	$ (0.67)	$ (0.59)	$ (2.04)
Weighted-average common shares outstanding, basic	38,507,542	37,780,547	38,292,497	37,623,309
Weighted-average common shares outstanding, diluted	39,570,394	37,780,547	38,292,497	37,623,309