Fair Value Measurements and Financial Instruments - Changes in Estimated Fair Value of Level 3 Financial Assets and Liabilities (Detail) $ in Thousands	6 Months Ended
Jun. 30, 2025 USD ($)
Receivable from GCBP
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance at December 31, 2024	$ 4,961
Changes in fair value	39
Change due to settlements	(5,000)
CVR Derivative Liability
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance at December 31, 2024	4,961
Changes in fair value	39
Change due to settlements	(5,000)
Warrant Liability, Noncurrent
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance at December 31, 2024	5,668
Changes in fair value	(2,467)
Balance at June 30, 2025	$ 3,201

Fair value, assets and liabilities measured on recurring basis, unobservable input reconciliation.

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Amount of increase (decrease) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
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+ References

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Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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