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Fair Value Measurements - (Additional Information) (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Jun. 20, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Proceeds from the issuance of SAFEs | $ 34,100 | $ 0 | $ 34,125 |
Common stock, shares, issued | 1,407,753 | 14,856,309 | 1,407,753 |
Common stock, price per share | $ 0.0001 | $ 0.0001 | $ 0.0001 |
Fair value input amount transfer in between levels |  | $ 0 | $ 0 |
Simple Agreements for Future Equity [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Common stock, shares, issued |  | 2,752,216 |  | 2,752,216
Common stock, price per share |  | $ 12.4 |  | $ 12.4
Simple Agreements for Future Equity [Member] | AVROBIO [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Common stock, shares, issued |  | 1,470,839 |  |
Common stock, price per share |  | $ 12.4 |  |

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