Quarterly report pursuant to Section 13 or 15(d)

Receivables (Details)

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Receivables (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Jun. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Receivables, gross     $ 57,362 $ 35,886
Less: allowance for doubtful accounts $ (30) $ (30) (30) (30)
Receivables, net     57,332 35,856
Allowance for Doubtful Accounts Receivable [Roll Forward]        
Beginning Balance 30 30    
Provision 0 0    
Charge-off 0 $ 0    
Ending Balance $ 30      
Customer trade receivables        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Receivables, gross     31,006 22,813
Wholesale trade advances        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Receivables, gross     25,423 10,722
Due from brokers        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Receivables, gross     $ 933 $ 2,351