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Segment Reporting and Geographic Information (Details Textual)
12 Months Ended
Dec. 31, 2014
Segment
Segment Reporting And Geographic Information (Textual) [Abstract]  
Number of reportable segments 3us-gaap_NumberOfReportableSegments
Percentage of customers accounted for the company's sale 10.00%mtrn_EntityWideRevenueMajorCustomerThreshold