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Balance Sheet Details - Schedule of Other Current Assets and Prepaid Expenses (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Prepaid clinical and related costs | $ 2,646 | $ 1,871
VAT receivable | 177 | 647
Prepaid insurance | 500 | 198
Other | 818 | 948
Total | $ 4,141 | $ 3,664

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