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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 808
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-Publisher FASB
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Amount of cash and cash equivalent restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 4
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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-Name Accounting Standards Codification
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Amount of revenue that is not accounted for under Topic 606.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section S99
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-SubTopic 10
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Closing stock price

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Common Stock, Shares Issued, Fair Market Value

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Grant Agreement, Unrecognized Premium Balance

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Grant Agreements (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended			9 Months Ended
	Jan. 13, 2022	Sep. 30, 2026	Mar. 31, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Restricted cash and cash equivalents, current		$ 1,933		$ 2,215	$ 1,933	$ 2,215	$ 1,922
Vaccinal Antibody Grant \| Grant revenue
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Other revenue		0		$ 0	0	$ 0
Vaccinal Antibody Grant \| Gates Foundation
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Common stock shares purchased (in shares)	881,365
Common stock, shares purchased price (in USD per share)	$ 45.38
Common stock, shares purchased, aggregate purchase price	$ 40,000
Common stock, shares issued, fair market value	$ 28,500
Closing stock price (in USD per share)	$ 37.65
Premium received	$ 11,300
Unrecognized premium		8,100			8,100
Unused grant funds returned			$ 9,500
Restricted cash and cash equivalents, current		1,800			1,800		$ 1,800
Vaccinal Antibody Grant \| Gates Foundation \| Balance Sheet Location: us-gaap:AccruedLiabilitiesAndOtherLiabilities
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Unrecognized premium		3,600			3,600
Vaccinal Antibody Grant \| Gates Foundation \| Balance Sheet Location: us-gaap:OtherLiabilitiesNoncurrent
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Unrecognized premium		$ 4,500			$ 4,500