Related Party Transactions - Additional Information (Detail) - Shin Nippon Biomedical Laboratories Ltd [Member] - USD ($) $ in Millions	3 Months Ended	6 Months Ended	39 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026
Related Party Transaction [Line Items]
Payments related to contract research services.	$ 1.9	$ 0.1	$ 4.8	$ 0.1	$ 8.2
Expenses incurred	$ 0.8	$ 1.0	$ 2.2	$ 1.6

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
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details