Collaborations - Change in Accounts Receivable, Contract Asset and Liabilities (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2024 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Accounts receivable and contract assets, Beginning balance	$ 18,762
Accounts receivable and contract assets, Additions	12,547
Accounts receivable and contract assets, Deductions	(29,992)
Accounts receivable and contract assets, Ending balance	1,317
Contract Liabilities, Beginning balance	54,651
Contract Liabilities, Additions	5,051
Contract Liabilities, Deductions	(39,678)
Contract Liabilities, Ending balance	20,024
Billed Receivables - Sanofi
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Accounts receivable and contract assets, Beginning balance	15,000
Accounts receivable and contract assets, Additions	7,496
Accounts receivable and contract assets, Ending balance	0
Contract Liabilities, Deductions	(22,496)
Unbilled Receivables - Sanofi
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Accounts receivable and contract assets, Beginning balance	3,762
Accounts receivable and contract assets, Additions	5,051
Accounts receivable and contract assets, Ending balance	1,317
Contract Liabilities, Deductions	(7,496)
Deferred Revenue - Sanofi
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Contract Liabilities, Beginning balance	54,651
Contract Liabilities, Additions	5,051
Contract Liabilities, Deductions	(39,678)
Contract Liabilities, Ending balance	$ 20,024