Annual report pursuant to Section 13 and 15(d)

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

v2.4.1.9
Changes in Initial Product Warranty Accrual and Expenses Under Initial and Extended Warranties (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Movement in Standard Product Warranty Accrual      
Initial warranty accrual, beginning balance $ 1,096us-gaap_StandardProductWarrantyAccrual $ 1,699us-gaap_StandardProductWarrantyAccrual $ 2,218us-gaap_StandardProductWarrantyAccrual
Provision for estimated warranty cost 1,214us-gaap_StandardProductWarrantyAccrualWarrantiesIssued 475us-gaap_StandardProductWarrantyAccrualWarrantiesIssued 1,705us-gaap_StandardProductWarrantyAccrualWarrantiesIssued
Warranty expenditures (861)us-gaap_ProductWarrantyExpense (1,078)us-gaap_ProductWarrantyExpense (2,224)us-gaap_ProductWarrantyExpense
Initial warranty accrual, ending balance 1,449us-gaap_StandardProductWarrantyAccrual 1,096us-gaap_StandardProductWarrantyAccrual 1,699us-gaap_StandardProductWarrantyAccrual
Less warranty accrual, long term 519us-gaap_ProductWarrantyAccrualNoncurrent 0us-gaap_ProductWarrantyAccrualNoncurrent 0us-gaap_ProductWarrantyAccrualNoncurrent
Total warranty accrual, current portion $ 930us-gaap_ProductWarrantyAccrualClassifiedCurrent $ 1,096us-gaap_ProductWarrantyAccrualClassifiedCurrent $ 1,699us-gaap_ProductWarrantyAccrualClassifiedCurrent