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Major Customer and Geographic Information (Schedule of Revenues from Non-affiliated Customers) (Details) - Revenue [Member]
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Customer A [Member]    
Revenue, Major Customer [Line Items]    
Risk percentage 33.00% 0.00%
Customer B [Member]    
Revenue, Major Customer [Line Items]    
Risk percentage 28.00% 22.00%
Customer C [Member]    
Revenue, Major Customer [Line Items]    
Risk percentage 12.00% 51.00%