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Balance Sheet Components - Summary of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
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Prepaid Expense and Other Assets, Current [Abstract] |  |
Prepaid research and development costs | $ 2,233 | $ 2,640
Prepaid insurance | 187 | 700
Prepaid and other current assets | 1,183 | 1,104
Total prepaid expenses and other current assets | $ 3,603 | $ 4,444

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