Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Condensed Consolidated Statements of Operations
License and collaboration revenue - related party	$ 859	$ 2,265	$ 26,581	$ 8,454
Revenue from Contract with Customer, Product and Service [Extensible List]	License and Collaboration Agreement	License and Collaboration Agreement	License and Collaboration Agreement	License and Collaboration Agreement
Operating expenses:
Research and development	$ 34,611	$ 26,432	$ 70,929	$ 50,677
General and administrative	7,691	6,715	18,206	12,680
Total operating expenses	42,302	33,147	89,135	63,357
Loss from operations	(41,443)	(30,882)	(62,554)	(54,903)
Interest income	484	97	652	199
Other expense, net	(78)	(57)	(65)	(136)
Net loss	$ (41,037)	$ (30,842)	$ (61,967)	$ (54,840)
Net loss per share, basic	$ (0.84)	$ (0.69)	$ (1.27)	$ (1.23)
Net loss per share diluted	$ (0.84)	$ (0.69)	$ (1.27)	$ (1.23)
Weighted-average shares used to compute net loss per share, basic	49,049,902	44,864,637	48,902,047	44,546,172
Weighted Average Number of Shares Outstanding, Diluted	49,049,902	44,864,637	48,902,047	44,546,172