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Organization and Summary of Significant Accounting Policies - Summary of Changes in Estimated Product Warranty Liabilities (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]    
Balance, beginning of period $ 1,476 $ 898
Utilization of reserve (350) (250)
Warranty expense (benefit) (114) 634
Balance, end of period $ 1,012 $ 1,282