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BALANCE SHEET COMPONENTS - Property and Equipment, Net (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Machinery and equipment $ 928 $ 821
Computer equipment, office equipment, and purchased software 101 101
Leasehold improvements 157 157
Accumulated depreciation and amortization (575) (359)
Property and equipment, net $ 611 $ 720