Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3
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, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Movement in Standard Product Warranty Accrual          
Balance, beginning of period $ 1,498 $ 1,359 $ 1,308 $ 1,190  
Provision for estimated warranty cost 523 203 1,145 827  
Warranty expenditures (366) (182) (798) (637)  
Balance, September 30 1,655 1,380 1,655 1,380  
Less warranty accrual, long-term 701 375 701 375 $ 447
Total warranty accrual, current portion $ 954 $ 1,005 $ 954 $ 1,005 $ 861