Quarterly report pursuant to Section 13 or 15(d)

Certain Risks and Concentrations (Details)

v3.8.0.1
Certain Risks and Concentrations (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Major suppliers [Member] | A (Hai Yi Shipping Limited, a related party) [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage [1] 84.00% 10.00% 41.00%
Major suppliers [Member] | B (Haifeng Dafu Enterprise Co., Ltd., a related party) [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage 14.00%
Major suppliers [Member] | C (Hong Fa Shipping Limited, a related party) [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage [1] [1] 30.00% 44.00%
Major suppliers [Member] | D (Hong Long, a related party) [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage 13.00% [1] 29.00% [1]
Major suppliers [Member] | E [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage 64.00% [1] [1] [1]
Major customers [Member] | A [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage [1] 19.00% [1] 11.00%
Major customers [Member] | B [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage [1] 12.00% [1] [1]
Major customers [Member] | C [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage [1] 12.00% [1] [1]
Major customers [Member] | D [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage 20.00% [1] 11.00% [1]
Major customers [Member] | E [Member]        
Concentration Risk [Line Items]        
Concentration risk, Percentage 10.00% [1] [1] [1]
[1] less than 10%