Quarterly report pursuant to Section 13 or 15(d)

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

v3.3.0.814
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, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Movement in Standard Product Warranty Accrual          
Initial warranty accrual, beginning balance $ 1,997 $ 1,255 $ 1,449 $ 1,096  
Provision for estimated warranty cost 608 310 1,604 919  
Warranty expenditures (270) (199) (718) (649)  
Initial warranty accrual, ending balance 2,335 1,366 2,335 1,366  
Less warranty accrual, long-term 1,059 367 1,059 367 $ 519
Total warranty accrual, current portion $ 1,276 $ 999 $ 1,276 $ 999 $ 930