Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
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, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Movement in Standard Product Warranty Accrual          
Balance, beginning of period $ 551 $ 853 $ 1,132 $ 1,110  
Provision for estimated warranty cost 832 345 1,129 575  
Warranty expenditures (366) (344) (1,244) (831)  
Balance, end of period 1,017 854 1,017 854  
Less: long-term portion of warranty accrual 472 204 472 204 $ 384
Current portion of warranty accrual $ 545 $ 650 $ 545 $ 650 $ 748