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Major Customer and Geographic Information (Schedule of Non-affiliated Customers with Accounts Receivable) (Details) - Accounts Receivable [Member]
6 Months Ended 12 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Customer A [Member]    
Concentration Risk [Line Items]    
Risk percentage 44.00% 26.00%
Customer B [Member]    
Concentration Risk [Line Items]    
Risk percentage 25.00% 47.00%
Customer C [Member]    
Concentration Risk [Line Items]    
Risk percentage 14.00% 5.00%