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Concentrations of Credit Risk and Major Customers (Details Textual)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Customers [Member]      
Concentrations of Credit Risk and Major Customers (Textual)      
Customer, concentration risk, description Customers accounting for 10% or more Customers accounting for 10% or more Customers accounting for 10% or more
Concentration risk, percentage [1] 12.00% [1]
Customer [Member] | Accounts Receivable [Member]      
Concentrations of Credit Risk and Major Customers (Textual)      
Concentration risk, percentage   24.07%  
Customer B [Member]      
Concentrations of Credit Risk and Major Customers (Textual)      
Concentration risk, percentage 10.89% 12.67% 12.54%
Customer B [Member] | Accounts Receivable [Member]      
Concentrations of Credit Risk and Major Customers (Textual)      
Concentration risk, percentage 14.77%    
Customer C [Member] | Accounts Receivable [Member]      
Concentrations of Credit Risk and Major Customers (Textual)      
Concentration risk, percentage   10.99%  
Customer E [Member] | Accounts Receivable [Member]      
Concentrations of Credit Risk and Major Customers (Textual)      
Concentration risk, percentage 15.76%    
Suppliers [Member]      
Concentrations of Credit Risk and Major Customers (Textual)      
Supplier, concentration risk, description Suppliers accounting for 10 Suppliers accounting for 10% or more Suppliers accounting for 10% or more
Concentration risk, percentage 10.65% 14.12% [1]
Suppliers [Member] | Account Payable [Member]      
Concentrations of Credit Risk and Major Customers (Textual)      
Concentration risk, percentage 10.00% 10.00%  
Suppliers [Member] | Notes Payable [Member]      
Concentrations of Credit Risk and Major Customers (Textual)      
Concentration risk, percentage 10.00% 10.00%  
[1] Less than 10%