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 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Movement in Standard Product Warranty Accrual          
Initial warranty accrual, beginning balance $ 2,060 $ 1,667 $ 2,188 $ 1,449  
Provision for estimated warranty cost 36 545 97 996  
Warranty expenditures (177) (215) (366) (448)  
Initial warranty accrual, ending balance 1,919 1,997 1,919 1,997  
Less warranty accrual, long-term 866 868 866 868 $ 843
Total warranty accrual, current portion $ 1,053 $ 1,129 $ 1,053 $ 1,129 $ 1,345