Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue
Collaborations, milestones, and royalties	$ 27,299	$ 19,683	$ 142,969	$ 121,096
Operating expenses
Research and development	53,273	50,610	148,111	141,519
General and administrative	12,374	10,373	34,738	27,462
Total operating expenses	65,647	60,983	182,849	168,981
Loss from operations	(38,348)	(41,300)	(39,880)	(47,885)
Other income (expenses)
Interest income, net	1,379	196	2,749	558
Other expense, net	(1)	(593)	(244)	(610)
Gain (loss) on equity securities, net	5,299	1,506	(4,676)	57,507
Total other income (expense), net	6,677	1,109	(2,171)	57,455
Income (loss) before income tax expense	(31,671)	(40,191)	(42,051)	9,570
Income tax expense	1,088	0	1,088	0
Net income (loss)	(32,759)	(40,191)	(43,139)	9,570
Other comprehensive loss
Net unrealized loss on marketable debt securities	(931)	(59)	(8,366)	(149)
Comprehensive income (loss)	$ (33,690)	$ (40,250)	$ (51,505)	$ 9,421
Net income (loss) per share attributable to common stockholders:
Basic net income (loss) per common share (in dollars per share)	$ (0.55)	$ (0.69)	$ (0.72)	$ 0.16
Diluted net income (loss) per common share (in dollars per share)	$ (0.55)	$ (0.69)	$ (0.72)	$ 0.16
Weighted average shares used to compute net income (loss) per share attributable to common stockholders:
Basic (in shares)	59,716,594	58,350,647	59,564,985	58,199,928
Diluted (in shares)	59,716,594	58,350,647	59,564,985	60,346,480