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Balance Sheet Components Warranty Accrual Activity (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Movement in Standard Product Warranty Accrual [Roll Forward]    
Balance at beginning of period $ 11,205 $ 8,551
Charged to cost of net revenues 8,047 9,429
Actual warranty expenditures (8,229) (7,178)
Balance at end of period $ 11,023 $ 10,802