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Financial Statements Details - Warranty Accrual (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Warranty [Roll Forward]    
Warranty accrual, beginning of period $ 6,742 $ 5,362
Liabilities accrued for warranties issued during the period 1,070 932
Warranty costs incurred during the period (1,471) (1,168)
Warranty accrual, end of period $ 6,341 $ 5,126