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Balance Sheet Components - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Accrued liabilities |  |
Payroll-related expenses | $ 1,578 | $ 1,606
Inventory | 199 | 157
Other | 476 | 686
Total accrued liabilities | $ 2,253 | $ 2,449

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