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Concentration and Major Customers and Suppliers (Details) - Customers
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Concentration and Major Customers and Suppliers (Textual)    
Number of major suppliers 2 2
Number of customer contributed over 10% of total sales
Sales [Member]    
Concentration and Major Customers and Suppliers (Textual)    
Percentage of revenue 10.00% 10.00%
Supplier One [Member]    
Concentration and Major Customers and Suppliers (Textual)    
Percentage of revenue 69.00% 62.00%
Supplier Two [Member]    
Concentration and Major Customers and Suppliers (Textual)    
Percentage of revenue 8.00% 8.00%