Collaborations - Change in Accounts Receivable, Contract Asset and Liabilities (Details) $ in Thousands	6 Months Ended
	Jun. 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	9,526
Accounts receivable and contract assets, Deductions	(26,584)
Accounts receivable and contract assets, Ending balance	1,704
Contract Liabilities, Beginning balance	54,651
Contract Liabilities, Additions	3,734
Contract Liabilities, Deductions	(35,937)
Contract Liabilities, Ending balance	22,448
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	5,792
Accounts receivable and contract assets, Deductions	(20,792)
Accounts receivable and contract assets, Ending balance	0
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	3,734
Accounts receivable and contract assets, Deductions	(5,792)
Accounts receivable and contract assets, Ending balance	1,704
Deferred Revenue - Sanofi
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Contract Liabilities, Beginning balance	54,651
Contract Liabilities, Additions	3,734
Contract Liabilities, Deductions	(35,937)
Contract Liabilities, Ending balance	$ 22,448