Nature of Business, Going Concern and Basis of Presentation (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended					6 Months Ended
	Jan. 31, 2022	Jul. 31, 2020	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Organization Consolidation And Presentation Of Financial Statements
Upfront payment received		$ 15,000
Net loss			$ (29,487)	$ (30,488)		$ (27,313)	$ (26,914)	$ (59,975)	$ (54,227)
Accumulated deficit			$ (433,113)					(433,113)		$ (373,138)
Eli Lilly
Organization Consolidation And Presentation Of Financial Statements
Upfront payment received	$ 300,000							$ 300,000
Merck | Merck Collaboration Agreement
Organization Consolidation And Presentation Of Financial Statements
Payment received for achievement of milestones					$ 5,000