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Segments and Major Customers (Details 1) - Customer Concentration Risk - Accounts Receivable [Member]
Jun. 30, 2018
Dec. 31, 2017
Customer 1 [Member]    
Concentration Risk [Line Items]    
Customer concentration risk 25.00%  
Customer 2 [Member]    
Concentration Risk [Line Items]    
Customer concentration risk   11.00%
Customer 3 [Member]    
Concentration Risk [Line Items]    
Customer concentration risk   12.00%
Customer 4 [Member]    
Concentration Risk [Line Items]    
Customer concentration risk   13.00%
Customer 5 [Member]    
Concentration Risk [Line Items]    
Customer concentration risk 12.00%