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Balance Sheet Components - Schedule of Prepaid Expenses and Other Current Asset (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Prepaid expenses | $ 272 | $ 700
Prepaid research and development costs | 117 | 337
Other current assets | 35 | 96
Total | $ 424 | $ 1,133

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