Quarterly report pursuant to Section 13 or 15(d)

Certain Risks and Concentrations (Details)

v3.7.0.1
Certain Risks and Concentrations (Details)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Major suppliers [Member] | A (Hong Fa Shipping Limited, a related party) [Member]    
Concentration Risk [Line Items]    
Concentration risk, Percentage 38.00% 36.00%
Major suppliers [Member] | B (Hong Long, a related party) [Member]    
Concentration Risk [Line Items]    
Concentration risk, Percentage 25.00% [1]
Major suppliers [Member] | C (Hai Yi Shipping Ltd., a related party) [Member]    
Concentration Risk [Line Items]    
Concentration risk, Percentage 20.00% 42.00%
Major suppliers [Member] | D [Member]    
Concentration Risk [Line Items]    
Concentration risk, Percentage 14.00% [1]
Major suppliers [Member] | E (PT Avona Mina Lestari, a related party) [Member]    
Concentration Risk [Line Items]    
Concentration risk, Percentage [1] 17.00%
Major customers [Member] | A [Member]    
Concentration Risk [Line Items]    
Concentration risk, Percentage 13.00% [1]
Major customers [Member] | B [Member]    
Concentration Risk [Line Items]    
Concentration risk, Percentage 13.00% [1]
[1] less than 10%