Collaborations - Change in Accounts Receivable, Contract Asset and Liabilities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 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	14,809
Accounts receivable and contract assets, Deductions	(32,624)
Accounts receivable and contract assets, Ending balance	947
Contract Liabilities, Beginning balance	54,651
Contract Liabilities, Additions	5,997
Contract Liabilities, Deductions	(47,072)
Contract Liabilities, Ending balance	13,576
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	8,812
Accounts receivable and contract assets, Deductions	(23,812)
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	5,997
Accounts receivable and contract assets, Deductions	(8,812)
Accounts receivable and contract assets, Ending balance	947
Deferred Revenue - Sanofi
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Contract Liabilities, Beginning balance	54,651
Contract Liabilities, Additions	5,997
Contract Liabilities, Deductions	(47,072)
Contract Liabilities, Ending balance	$ 13,576