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, 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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+ Details

Revenue - Summary of Revenue (Details) - USD ($)	12 Months Ended
Revenue - Summary of Revenue (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation Of Revenue [Line Items]
Total revenue	$ 82,031,000	$ 152,310,000	$ 166,799,000
Collaboration Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	67,221,000	138,389,000	157,748,000
Grant Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	14,810,000	13,921,000	9,051,000
CSL Seqirus [Member] \| Collaboration Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	65,982,000	138,389,000	154,264,000
Ultragenyx [Member] \| Collaboration Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue			1,837
Other [Member] \| Collaboration Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	1,239,000		1,647,000
BARDA [Member] \| Grant Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	13,236,000	$ 13,921,000	$ 9,051,000
Gates Foundation [Member] \| Grant Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 1,574,000