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BALANCE SHEET COMPONENTS - Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Prepayment for insurance $ 324 $ 64
Advance payments for inventory purchases 300 349
Deferred initial public offering costs 0 225
Other 448 260
Prepaid expenses and other current assets $ 1,072 $ 898