Quarterly report pursuant to Section 13 or 15(d)

Reserve for Product Warranties - Narrative (Details)

v3.20.2
Reserve for Product Warranties - Narrative (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Dec. 31, 2018
Product Warranties Disclosures [Abstract]            
Product warranty period (in years) 1 year          
Product Liability Contingency [Line Items]            
Accrual of estimated costs $ 4,848 $ 5,683 $ 6,404 $ 7,427 $ 8,076 $ 9,391