Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

v2.4.0.8
Summary of Significant Accounting Policies (Narrative) (Details) (USD $)
 0 Months Ended 3 Months Ended
Sep. 19, 2014
tranch
Sep. 30, 2014
Segment
Sep. 30, 2013
Sep. 25, 2014
Jun. 30, 2014
Feb. 18, 2014
Property, Plant and Equipment [Line Items]            
Number of reportable segments   1        
Premium on metals position   $ 2,778,000     $ 3,285,000  
Commemorative coin inventory, held at lower of cost or market   (816,000)     (2,564,000)  
Borrowed metals   12,000,000     8,700,000  
Inventories loaned under consignment   4,300,000     11,100,000  
Product under financing arrangement   20,600,000     24,600,000  
Inventory subject to repurchase included in inventory   26,100,000     24,600,000  
Ownership percentage           2.50%
Investments   1,611,000     500,000 500,000
Advertising expense   100,000 100,000      
Shipping, handling costs   1,500,000 1,700,000      
Number of tranches 2          
Payment for closing of Tranche A 2,000,000          
Payments to acquire Tranche A 1,100,000          
Payable on closing of Tranche B       900,000    
Cost Method Investment, Exclusive Supplier Agreement, Period, Tranche One 5 years          
Exclusive supplier agreement, period 3 years          
Payables   83,000     272,000  
Receivable   3,421,000     5,852,000  
Minimum
            
Property, Plant and Equipment [Line Items]            
Estimated useful lives of related assets   3 years        
Estimated useful lives of intangibles   4 years        
Maximum
            
Property, Plant and Equipment [Line Items]            
Estimated useful lives of related assets   5 years        
Estimated useful lives of intangibles   15 years        
Common Class A
            
Property, Plant and Equipment [Line Items]            
Agreement to purchase noncontrolling interest, percentage 9.00%          
Percentage of stock to be purchased for Tranche A 5.00%          
Percentage of stock to be purchased for Tranche B 4.00%          
Cost-method Investee
            
Property, Plant and Equipment [Line Items]            
Revenue from related party   87,900,000 36,300,000      
Purchases from related party   65,500,000 14,500,000      
Payables   12,400,000     3,500,000  
Receivable   $ 11,000,000     $ 2,600,000