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Prepaid expenses - Additional Information (Detail) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Prepaid Expenses |  |
Prepaid expenses | $ 529 | $ 8,154
Prepaid R&D clinical costs | 13 | 7,245
Prepaid insurance | 149 | 492
Other prepaid costs | $ 367 | $ 417

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