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Major Customer and Geographic Information (Schedule of Non-affiliated Customers with Accounts Receivable) (Details) - Accounts Receivable [Member]
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Customer A [Member]    
Concentration Risk [Line Items]    
Risk percentage 55.00% 46.00%
Customer B [Member]    
Concentration Risk [Line Items]    
Risk percentage 23.00% 35.00%