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 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Movement in Standard Product Warranty Accrual          
Balance, beginning of period $ 1,158 $ 1,384 $ 1,110 $ 1,308  
Provision for estimated warranty cost (261) 383 (18) 622  
Warranty expenditures (43) (268) (238) (431)  
Balance, end of period 854 1,499 854 1,499  
Less warranty accrual, long-term 194 735 194 735 $ 245
Total warranty accrual, current portion $ 660 $ 764 $ 660 $ 764 $ 865