Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Changes in Initial Product Warranty Accrual and Expenses Under Initial and Extended Warranties (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Movement in Standard Product Warranty Accrual      
Initial warranty accrual, beginning balance $ 1,449 $ 1,096 $ 1,699
Provision for estimated warranty cost 1,715 1,214 475
Warranty expenditures (976) (861) (1,078)
Initial warranty accrual, ending balance 2,188 1,449 1,096
Less warranty accrual, long-term 843 519  
Total warranty accrual, current portion $ 1,345 $ 930 $ 1,096