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Financial Statements Details - Warranty Accrual (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Warranty [Roll Forward]    
Warranty accrual, beginning of period $ 9,314 $ 6,742
Liabilities accrued for warranties issued during the period 3,456 1,070
Warranty costs incurred during the period (2,727) (1,471)
Warranty accrual, end of period $ 10,043 $ 6,341