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Prepaid Expenses, Other Current Assets and Other Noncurrent Assets - Summary Of Prepaid Expenses And Other Nonurrent Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Prepaid Expense and Other Assets, Noncurrent [Abstract] |  |
Deferred transaction costs | $ 3,912 | $ 0
Prepaid external research and development—long term | 676 | 0
Other | 23 | 108
Total other noncurrent assets | $ 4,611 | $ 108

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