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Balance Sheet Components - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Prepaid general and administrative | $ 941 | $ 1,170
Prepaid research and development | 124 | 441
Tax-related receivable | 28 | 848
Prepaid contract research organization expenses | 276 | 431
Other current assets | 143 | 148
Total prepaid and other current assets | $ 1,512 | $ 3,038

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