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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

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Collaboration Agreements - Sanofi (Details) - USD ($)	3 Months Ended		6 Months Ended		93 Months Ended
Collaboration Agreements - Sanofi (Details) - USD ($)	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Dec. 31, 2025
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Total collaboration revenue	$ 3,604,000	$ 0	$ 3,604,000	$ 0
Sanofi \| Collaborative Arrangement
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Remaining performance obligation	0		0		$ 0
Contract liability	0		0		0	$ 0
Sanofi \| Collaborative Arrangement \| Peripheral Program License
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Milestone payments upon achievement of certain clinical, regulatory and sales milestone events	$ 495,000,000.0		$ 495,000,000.0		495,000,000.0
Sanofi \| Collaborative Arrangement \| Milestone Triggered
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Total collaboration revenue					100,000,000.0
Sanofi \| Collaborative Arrangement \| Product
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Total collaboration revenue					$ 0