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SEGMENT INFORMATION (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 Country Region | Dec. 31, 2013
SEGMENT INFORMATION [Abstract] |  |
Minimum percentage of revenue considered for accounted of major customer (in hundredths) | 10.00%mtex_MinimumPercentageOfRevenueConsideredForAccountedOfMajorCustomer |
Number of countries in which company operates facilities | 10 us-gaap_NumberOfCountriesInWhichEntityOperates |
Number of countries in which company sells products | 24 mtex_NumberOfCountriesInWhichEntitySellsProducts |
Number of regions in which company sells products | 3 mtex_NumberOfRegionsInWhichCompanySellsProducts |
Revenue from External Customer [Line Items] |  |
Consolidated net sales shipped to customers | $ 190,100,000 us-gaap_SalesRevenueNet | $ 177,400,000 us-gaap_SalesRevenueNet
Percent of total revenue (in hundredths) | 100.00%mtex_SalesRevenueGoodsPercentage | 100.00%mtex_SalesRevenueGoodsPercentage
Long-lived assets by country of domicile [Abstract] |  |
Long-lived assets | 4,103,000 us-gaap_PropertyPlantAndEquipmentNet | 3,239,000 us-gaap_PropertyPlantAndEquipmentNet
Inventory, by Country [Abstract] |  |
Inventories, net | 10,591,000 us-gaap_InventoryNet | 13,988,000 us-gaap_InventoryNet
North America [Member] |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales shipped to customers | 80,800,000 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember | 82,200,000 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember
Percent of total revenue (in hundredths) | 42.50%mtex_SalesRevenueGoodsPercentage / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember | 46.30%mtex_SalesRevenueGoodsPercentage / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember
Long-lived assets by country of domicile [Abstract] |  |
Long-lived assets | 3,100,000 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember | 2,400,000 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember
Inventory, by Country [Abstract] |  |
Inventories, net | 4,000,000 us-gaap_InventoryNet / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember | 6,400,000 us-gaap_InventoryNet / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember
Asia/Pacific [Member] |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales shipped to customers | 92,400,000 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember | 80,300,000 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember
Percent of total revenue (in hundredths) | 48.60%mtex_SalesRevenueGoodsPercentage / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember | 45.30%mtex_SalesRevenueGoodsPercentage / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember
Long-lived assets by country of domicile [Abstract] |  |
Long-lived assets | 800,000 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember | 400,000 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember
Inventory, by Country [Abstract] |  |
Inventories, net | 4,300,000 us-gaap_InventoryNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember | 5,300,000 us-gaap_InventoryNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember
EMEA [Member] |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales shipped to customers | 16,900,000 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember | 14,900,000 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember
Percent of total revenue (in hundredths) | 8.90%mtex_SalesRevenueGoodsPercentage / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember | 8.40%mtex_SalesRevenueGoodsPercentage / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember
Long-lived assets by country of domicile [Abstract] |  |
Long-lived assets | 200,000 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember | 400,000 us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember
Inventory, by Country [Abstract] |  |
Inventories, net | 2,300,000 us-gaap_InventoryNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember | 2,300,000 us-gaap_InventoryNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember
Consolidated Product Sales [Member] |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales shipped to customers | 155,300,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = mtex_ConsolidatedProductSalesMember | 143,500,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = mtex_ConsolidatedProductSalesMember
Consolidated Pack Sales [Member] |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales shipped to customers | 27,800,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = mtex_ConsolidatedPackSalesMember | 26,200,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = mtex_ConsolidatedPackSalesMember
Consolidated Other, Including Freight [Member] |  |
Revenue from External Customer [Line Items] |  |
Consolidated net sales shipped to customers | $ 7,000,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = mtex_ConsolidatedOtherIncludingFreightMember | $ 7,700,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = mtex_ConsolidatedOtherIncludingFreightMember

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