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Accrued Liabilities - Schedule of Accrued Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Accrued Liabilities [Abstract]    
Accrued payroll and benefits $ 834us-gaap_AccruedEmployeeBenefitsCurrent $ 1,136us-gaap_AccruedEmployeeBenefitsCurrent
Retirement reserve (see note 16) 521emri_AccruedPensionObligation 455emri_AccruedPensionObligation
Advance payments from customers, current portion 758emri_AccruedPaymentsFromCustomers 694emri_AccruedPaymentsFromCustomers
Warranty reserve 581us-gaap_ProductWarrantyAccrualClassifiedCurrent 675us-gaap_ProductWarrantyAccrualClassifiedCurrent
Foreign currency exposure provision 414emri_ForeignCurrencyExposureProvision 321emri_ForeignCurrencyExposureProvision
Accrued taxes (other than income taxes) 486us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent 125us-gaap_AccrualForTaxesOtherThanIncomeTaxesCurrent
Accrued engineering contract costs 244emri_AccruedEngineeringContractCosts 501emri_AccruedEngineeringContractCosts
Research & Development grant reclaim accrual (see note 20) 62emri_ResearchDevelopmentGrantReclaimAccrual   
Other accrued expenses 524us-gaap_OtherAccruedLiabilitiesCurrent 352us-gaap_OtherAccruedLiabilitiesCurrent
Total accrued expenses $ 4,424us-gaap_AccruedLiabilitiesCurrent $ 4,259us-gaap_AccruedLiabilitiesCurrent