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EMPLOYEE BENEFIT PLANS (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Age
Dec. 31, 2013
EMPLOYEE BENEFIT PLANS [Abstract]    
Service period, minimum 3 months  
Employees eligible age under plan, minimum 21mtex_DefinedContributionPlanEmployeesEligibleAgeMinimum  
Maximum annual contribution per employee (in hundredths) 100.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent  
Vesting period of employer's matching contributions 5 years  
Contributions by employer $ 200,000us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount $ 100,000us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Projected benefit obligation [Roll Forward]    
Balance, beginning of year 629,000us-gaap_DefinedBenefitPlanBenefitObligation 714,000us-gaap_DefinedBenefitPlanBenefitObligation
Service cost 88,000us-gaap_DefinedBenefitPlanServiceCost 106,000us-gaap_DefinedBenefitPlanServiceCost
Interest cost 3,000us-gaap_DefinedBenefitPlanInterestCost 6,000us-gaap_DefinedBenefitPlanInterestCost
Liability losses (6,000)us-gaap_DefinedBenefitPlanActuarialGainLoss 59,000us-gaap_DefinedBenefitPlanActuarialGainLoss
Benefits paid to participants (122,000)us-gaap_DefinedBenefitPlanBenefitsPaid (121,000)us-gaap_DefinedBenefitPlanBenefitsPaid
Special termination benefit 34,000us-gaap_DefinedBenefitPlanSpecialTerminationBenefits 0us-gaap_DefinedBenefitPlanSpecialTerminationBenefits
Prior service cost 0mtex_DefinedBenefitPlanPriorServiceCost 0mtex_DefinedBenefitPlanPriorServiceCost
Foreign currency (77,000)us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation (135,000)us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation
Balance, end of year 549,000us-gaap_DefinedBenefitPlanBenefitObligation 629,000us-gaap_DefinedBenefitPlanBenefitObligation
Plan assets [Roll Forward]    
Fair value, beginning of year 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Company contributions 122,000us-gaap_DefinedBenefitPlanContributionsByEmployer 121,000us-gaap_DefinedBenefitPlanContributionsByEmployer
Benefits paid to participants (122,000)us-gaap_DefinedBenefitPlanBenefitsPaid (121,000)us-gaap_DefinedBenefitPlanBenefitsPaid
Fair value, end of year 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Funded status of the Benefit Plan [Abstract]    
Benefit obligation (549,000)us-gaap_DefinedBenefitPlanBenefitObligation (629,000)us-gaap_DefinedBenefitPlanBenefitObligation
Fair value of plan assets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets 0us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Excess of benefit obligation over fair value of plan assets (549,000)us-gaap_DefinedBenefitPlanFundedStatusOfPlan (629,000)us-gaap_DefinedBenefitPlanFundedStatusOfPlan
Amounts recognized in the accompanying Consolidated Balance Sheets [Abstract]    
Accrued benefit liability (549,000)us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent (629,000)us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent
Transition obligation and unrealized gain (372,000)mtex_DefinedBenefitPlanTransitionObligationAndUnrealizedGain (458,000)mtex_DefinedBenefitPlanTransitionObligationAndUnrealizedGain
Net amount recognized in the consolidated balance sheets (921,000)us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet (1,087,000)us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet
Other changes recognized in comprehensive income/loss [Abstract]    
Net periodic cost 85,000us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax 64,000us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax
Current year (gain) loss (6,000)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax 59,000us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
Amortization of transition obligation (4,000)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetTransitionAssetObligationNetOfTax (4,000)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetTransitionAssetObligationNetOfTax
Total recognized in other comprehensive income (10,000)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent 55,000us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent
Total recognized in comprehensive income (loss) 75,000mtex_ComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent 119,000mtex_ComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent
Amounts not yet reflected in net periodic benefit cost and included in accumulated other comprehensive gain/loss [Abstract]    
Transition obligation 13,000us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax 66,000us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax
Prior service cost 353,000us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax 447,000us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax
Net actuarial gain 6,000us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax (55,000)us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax
Total recognized in accumulated other comprehensive loss 372,000us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossAfterTax 458,000us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossAfterTax
2015 estimated amounts of amortized transition obligation [Abstract]    
Transition obligation (4,000)us-gaap_DefinedBenefitPlanAmortizationOfNetTransitionAssetObligation  
Aggregate Benefit Plan information and accumulated benefit obligation in excess of plan assets [Abstract]    
Projected benefit obligation 549,000us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation 629,000us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation
Accumulated benefit obligation 549,000us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation 629,000us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
Fair value of plan assets 0us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets 0us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets
Weighted-average assumptions to determine the benefit obligation and net cost [Abstract]    
Discount rate (in hundredths) 0.50%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate 0.50%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
Rate of increase in compensation levels (in hundredths) 0.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease 0.00%us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
Pension expense for Benefit Plan included in selling, general and administrative expenses [Abstract]    
Service cost 88,000us-gaap_DefinedBenefitPlanServiceCost 106,000us-gaap_DefinedBenefitPlanServiceCost
Interest cost 3,000us-gaap_DefinedBenefitPlanInterestCost 6,000us-gaap_DefinedBenefitPlanInterestCost
Amortization of transition obligation 4,000us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets 4,000us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets
Gain 0us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses (4,000)us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses
Special termination 34,000us-gaap_DefinedBenefitPlanSpecialTerminationBenefits 0us-gaap_DefinedBenefitPlanSpecialTerminationBenefits
Prior service cost (44,000)us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit (48,000)us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
Benefit adjustment 0us-gaap_DefinedBenefitPlanOtherCosts 0us-gaap_DefinedBenefitPlanOtherCosts
Total pension expense 85,000us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost 64,000us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Expected employer's contributions in 2015 66,000us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear  
Period over which benefits are expected to be paid 10 years  
Benefits expected to be paid by the Benefit Plan [Abstract]    
2015 66,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths  
2016 60,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo  
2017 57,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree  
2018 54,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour  
2019 50,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive  
Next five years 293,000us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter  
Total expected benefits to be paid $ 580,000mtex_DefinedBenefitPlanExpectedFutureBenefitPayments