Quarterly report pursuant to Section 13 or 15(d)

Changes in Initial Product Warranty Accrual and Expenses Under Initial and Extended Warranties (Detail)

v3.20.2
Changes in Initial Product Warranty Accrual and Expenses Under Initial and Extended Warranties (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Movement in Standard Product Warranty Accrual          
Balance, beginning of period $ 853 $ 1,498 $ 1,110 $ 1,308  
Provision for estimated warranty cost 345 523 575 1,145  
Warranty expenditures (344) (366) (831) (798)  
Balance, end of period 854 1,655 854 1,655  
Less warranty accrual, long-term 204 701 204 701 $ 245
Total warranty accrual, current portion $ 650 $ 954 $ 650 $ 954 $ 865