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Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Accrued compensation and benefits | $ 1,356 | $ 2,691
Accrued operational expenses | 410 | 582
Accrued restructuring costs | 155 | 2,073
Accrued research, development and clinical trial expenses | 952 | 209
Accrued in process research and development | $ 10,000 | $ 0
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Total accrued expenses and other current liabilities | Total accrued expenses and other current liabilities
Operating lease liabilities, current | $ 456 | $ 1,682
Total accrued expenses and other current liabilities | $ 13,329 | $ 7,237

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