Collaboration Agreements - Sanofi (Details) - USD ($)		3 Months Ended		66 Months Ended
		Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Dec. 31, 2023
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaboration revenue from customers	[1]	$ 0	$ 35,141,000
Sanofi | Collaborative Arrangement
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Contract liability		$ 0		$ 0	$ 0
Sanofi | Collaborative Arrangement | Milestone Triggered
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaboration revenue from customers				100,000,000
Sanofi | Collaborative Arrangement | Product
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaboration revenue from customers				$ 0

[1] Includes related-party collaboration revenue from customers of $0.1 million for the three months ended March 31, 2023.