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Development and License Agreements - Additional Information (Detail) - USD ($) $ in Millions | 1 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jul. 31, 2025 | Sep. 30, 2022 | Jun. 30, 2026 | Dec. 31, 2025 | Sep. 30, 2024 | Sep. 30, 2023
BARDA Agreement |  |  |  |  |  |
Licenses Agreements [Line Items] |  |  |  |  |  |
Additional committed fund receivable |  |  |  |  |  | $ 3.5
Committed fund receivable |  |  | $ 185.2 |  |  | $ 185.5
Receivable of billed and unbilled amounts |  |  | 2.5 | $ 2.5 |  |
2024 BARDA Agreement |  |  |  |  |  |
Licenses Agreements [Line Items] |  |  |  |  |  |
Committed fund receivable |  |  |  |  | $ 32.1 |
Committed fund receivable |  |  | 188.4 |  | $ 188.4 |
2024 BARDA Agreement | Accounts Receivable, Net |  |  |  |  |  |
Licenses Agreements [Line Items] |  |  |  |  |  |
Receivable of billed and unbilled amounts |  |  | 0.7 | 0.6 |  |
2024 BARDA Agreement | Cerus Corporation | Maximum |  |  |  |  |  |
Licenses Agreements [Line Items] |  |  |  |  |  |
Co-investment by the company |  |  | 60.1 |  |  |
DoD and IBAS Program Agreement | Prepaid and Other Current Assets |  |  |  |  |  |
Licenses Agreements [Line Items] |  |  |  |  |  |
Receivable of billed and unbilled amounts |  |  | $ 1.4 | $ 0.4 |  |
DoD and IBAS Program Agreement | Maximum |  |  |  |  |  |
Licenses Agreements [Line Items] |  |  |  |  |  |
Total contract value | $ 25.0 | $ 17.8 |  |  |  |
DoD and IBAS Program Agreement | Minimum |  |  |  |  |  |
Licenses Agreements [Line Items] |  |  |  |  |  |
Total contract value | $ 7.2 | $ 9.1 |  |  |  |

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- Definition Amount to be collected within one year of the balance sheet date (or one operating cycle, if longer) from customers in accordance with the contractual provisions of long-term contracts or programs including amounts billed and unbilled as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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