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The Company and Summary of Significant Accounting Policies - Warranty Liability (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Warranty liability    
Beginning Balance $ 364 $ 406
Provision for warranties issued 224 331
Warranty services provided (202) (291)
Ending Balance $ 386 $ 446