Quarterly report pursuant to Section 13 or 15(d)

Assets and Liabilities, at Fair Value (Narrative) (Details)

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Assets and Liabilities, at Fair Value (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended
Sep. 30, 2015
Jun. 30, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Commemorative coins, held at lower of cost or market $ 163,000 $ 1,518,000
Realized gains on cost method investment 0 $ 0
Fair Value, Measurements, Nonrecurring | Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cost method investment $ 2,500,000