License and Collaboration Agreements - Summary of Revenues by Collaboration and by Category of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
License And Collaboration Agreements [Line Items]
Total collaboration and license revenues	$ 33,581	$ 9,461	$ 78,345	$ 28,383
License and Development Services for all Gilead Programs
License And Collaboration Agreements [Line Items]
Total collaboration and license revenues	23,742		48,374
Gilead Access Rights
License And Collaboration Agreements [Line Items]
Total collaboration and license revenues	8,317	7,711	24,949	23,133
Taiho Access Rights
License And Collaboration Agreements [Line Items]
Total collaboration and license revenues	$ 1,522	$ 1,750	$ 5,022	$ 5,250