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Major Customer and Geographic Information (Schedule of Revenues from Non-affiliated Customers) (Details) - Revenue [Member]
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Customer A [Member]        
Revenue, Major Customer [Line Items]        
Risk percentage 64.00% 57.00% 59.00% 50.00%
Customer B [Member]        
Revenue, Major Customer [Line Items]        
Risk percentage 16.00% 16.00% 20.00% 18.00%