Annual report pursuant to Section 13 and 15(d)

Certain Risks and Concentrations (Details Textual)

v3.8.0.1
Certain Risks and Concentrations (Details Textual)
12 Months Ended
Dec. 31, 2017
Customer
Supplier
Dec. 31, 2016
Supplier
Dec. 31, 2015
Major suppliers [Member] | Purchases [Member]      
Certain Risks and Concentrations (Textual)      
Concentration risk, Percentage 10.00% 10.00% 10.00%
Major suppliers [Member] | Accounts payable - related parties [Member]      
Certain Risks and Concentrations (Textual)      
Concentration risk, Percentage 10.00% 10.00%  
Number of suppliers 3 3  
Major suppliers [Member] | Accounts payable - related parties one [Member]      
Certain Risks and Concentrations (Textual)      
Concentration risk, Percentage 70.70% 95.70%  
Number of suppliers 3 3  
Major customers [Member] | Accounts receivable [Member]      
Certain Risks and Concentrations (Textual)      
Concentration risk, Percentage 10.00% 10.00%  
Number of customer | Customer 2    
Major customers [Member] | Accounts receivable one [Member]      
Certain Risks and Concentrations (Textual)      
Concentration risk, Percentage 28.90%