Annual report pursuant to Section 13 and 15(d)

Changes in Warranty Liability (Detail)

v2.4.1.9
Changes in Warranty Liability (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Product Warranty [Line Items]      
Warranty liability $ 597us-gaap_ProductWarrantyAccrual $ 346us-gaap_ProductWarrantyAccrual $ 43us-gaap_ProductWarrantyAccrual
Warranty liability assumed in acquisitions   101us-gaap_ProductWarrantyAccrualAdditionsFromBusinessAcquisition 303us-gaap_ProductWarrantyAccrualAdditionsFromBusinessAcquisition
Revision of warranty estimate (185)us-gaap_ProductWarrantyAccrualPreexistingIncreaseDecrease    
Provisions for current year sales 196us-gaap_ProductWarrantyAccrualWarrantiesIssued 348us-gaap_ProductWarrantyAccrualWarrantiesIssued 6us-gaap_ProductWarrantyAccrualWarrantiesIssued
Current year claims (165)us-gaap_ProductWarrantyAccrualPayments (198)us-gaap_ProductWarrantyAccrualPayments (6)us-gaap_ProductWarrantyAccrualPayments
Warranty liability $ 443us-gaap_ProductWarrantyAccrual $ 597us-gaap_ProductWarrantyAccrual $ 346us-gaap_ProductWarrantyAccrual