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The Company and Summary of Significant Accounting Policies - Accrued Warranty (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Movement in accrued warranty    
Balance January 1, $ 145  
Provision for warranties issued during the year 675 $ 288
Warranty services provided (414) (143)
Balance December 31, $ 406 $ 145