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CAPITAL LEASE OBLIGATIONS (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
CAPITAL LEASE OBLIGATIONS [Abstract]    
Net book value of leased assets $ 1,300,000us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet $ 600,000us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet
Schedule of future minimum lease payments [Abstract]    
2015 967,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent  
2016 444,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears  
2017 319,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears  
2018 133,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears  
2019 0us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears  
Total future minimum lease payments 1,863,000us-gaap_CapitalLeasesFutureMinimumPaymentsDue  
Less: Amounts representing interest (effective interest rate 6.1%) (110,000)us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments  
Present value of minimum lease payments 1,753,000us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments  
Current portion of capital lease obligations (901,000)us-gaap_CapitalLeaseObligationsCurrent (704,000)us-gaap_CapitalLeaseObligationsCurrent
Long-term portion of capital lease obligations $ 852,000us-gaap_CapitalLeaseObligationsNoncurrent $ 450,000us-gaap_CapitalLeaseObligationsNoncurrent
Capital Lease [Member]    
Capital Leased Assets [Line Items]    
Effective interest rate (in hundredths) 6.10%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ mtex_LeaseByTypeAxis
= us-gaap_CapitalLeaseObligationsMember