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Significant Customers (Details)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Customer [Member] | Accounts Receivable [Member]    
Concentration Risk [Line Items]    
Concentration risk, percentage 69.00% 75.00%
Customer One [Member] | Revenue [Member]    
Concentration Risk [Line Items]    
Concentration risk, percentage 18.00% 60.00%
Customer Two [Member] | Revenue [Member]    
Concentration Risk [Line Items]    
Concentration risk, percentage 13.00%  
Trade Receivables [Member]    
Concentration Risk [Line Items]    
Concentration risk, percentage 10.00% 10.00%