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Concentrations (Details) - Customers
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Accounts Receivable [Member]    
Concentrations (Textual)    
Number of customers 1 2
Percentage of concentrations of credit risk 100.00% 100.00%
Revenues [Member]    
Concentrations (Textual)    
Number of customers 1 4
Percentage of concentrations of credit risk 95.00% 85.00%