Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
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, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Movement in Standard Product Warranty Accrual          
Initial warranty accrual, beginning balance $ 1,919 $ 1,997 $ 2,188 $ 1,449  
Provision for estimated warranty cost 282 608 379 1,604  
Warranty expenditures (224) (270) (590) (718)  
Initial warranty accrual, ending balance 1,977 2,335 1,977 2,335  
Less warranty accrual, long-term 955 1,059 955 1,059 $ 843
Total warranty accrual, current portion $ 1,022 $ 1,276 $ 1,022 $ 1,276 $ 1,345