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Property and Equipment, Net - Additional Information (Detail) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Property Plant And Equipment [Line Items] |  |  |  |  |
Depreciation expense | $ 2,000 | $ 7,000 |  | $ 30,000 | $ 92,000
Impairment of property and equipment |  |  | $ 36,000 | $ 0 | $ 36,000

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