XML 34 R61.htm IDEA: XBRL DOCUMENT v2.4.1.9
GEOGRAPHIC AND CUSTOMER CONCENTRATION INFORMATION - Narrative (Details)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Concentration Risk [Line Items]      
Number of operating segment 1us-gaap_NumberOfOperatingSegments    
Customer concentration risk | Net revenue      
Concentration Risk [Line Items]      
Number of major customers 2mtsn_NumberOfSignificantCustomers
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= mtsn_SalesRevenueGoodsAndServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember		   2mtsn_NumberOfSignificantCustomers
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= mtsn_SalesRevenueGoodsAndServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
Customer concentration risk | Net revenue | Net revenue, major customer A      
Concentration Risk [Line Items]      
Concentration risk percentage 61.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= mtsn_SalesRevenueGoodsAndServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= mtsn_NetSalesMajorCustomerMember		 35.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= mtsn_SalesRevenueGoodsAndServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= mtsn_NetSalesMajorCustomerMember		 41.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= mtsn_SalesRevenueGoodsAndServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= mtsn_NetSalesMajorCustomerMember
Customer concentration risk | Net revenue | Net revenue, major customer B      
Concentration Risk [Line Items]      
Concentration risk percentage   33.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= mtsn_SalesRevenueGoodsAndServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= mtsn_NetSalesMajorCustomerBMember		 12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= mtsn_SalesRevenueGoodsAndServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= mtsn_NetSalesMajorCustomerBMember
Customer concentration risk | Accounts receivable      
Concentration Risk [Line Items]      
Number of major customers 1mtsn_NumberOfSignificantCustomers
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember		 2mtsn_NumberOfSignificantCustomers
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember		  
Customer concentration risk | Accounts receivable | Net accounts receivable, major customer D      
Concentration Risk [Line Items]      
Concentration risk percentage 74.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= mtsn_NetAccountsReceivableMajorCustomerDMember		 61.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= mtsn_NetAccountsReceivableMajorCustomerDMember		  
Customer concentration risk | Accounts receivable | Net accounts receivable, major customer E      
Concentration Risk [Line Items]      
Concentration risk percentage   23.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= mtsn_NetAccountsReceivableMajorCustomerEMember