Quarterly report pursuant to Section 13 or 15(d)

Customer and Supplier Concentration (Details)

v3.5.0.2
Customer and Supplier Concentration (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Jun. 30, 2016
Concentration Risk [Line Items]        
Revenues $ 1,805,653 $ 2,006,936    
Receivables, net 20,746     $ 43,302
Customer concentrations        
Concentration Risk [Line Items]        
Revenues 1,805,653 $ 2,006,936    
Receivables, net $ 20,746     $ 43,302
Concentration risk, percentage 100.00% 100.00%   100.00%
Revenue | Customer concentrations        
Concentration Risk [Line Items]        
Revenues $ 710,680 $ 468,771    
Concentration risk, percentage 39.40% 23.30%    
Account Receivable | Customer concentrations        
Concentration Risk [Line Items]        
Receivables, net $ 12,729     $ 5,256
Concentration risk, percentage 61.40%     12.10%
HSBC Bank USA | Revenue | Customer concentrations        
Concentration Risk [Line Items]        
Revenues $ 506,787 $ 333,553    
Concentration risk, percentage 28.10% 16.60%    
Mitsubishi International Corp. | Revenue | Customer concentrations        
Concentration Risk [Line Items]        
Revenues $ 203,893   $ 135,218  
Concentration risk, percentage 11.30% 6.70%    
Customer A | Account Receivable | Customer concentrations        
Concentration Risk [Line Items]        
Receivables, net $ 5,965     $ 0
Concentration risk, percentage 28.80%     0.00%
Customer B | Account Receivable | Customer concentrations        
Concentration Risk [Line Items]        
Receivables, net $ 6,764     $ 5,256
Concentration risk, percentage 32.60%     12.10%