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BALANCE SHEET COMPONENTS - Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Accrued compensation | $ 568 | $ 349
Accrued clinical trial expenses | 83 | 13
Accrued R&D expenses | 1,448 | 0
Accrued sales taxes | 79 | 67
Other | 519 | 140
Accrued expenses and other current liabilities | $ 2,697 | $ 569

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