Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - Additional Information (Details)

v3.24.3
Related Party Transactions - Additional Information (Details)
1 Months Ended 3 Months Ended
Mar. 04, 2022
USD ($)
Mar. 01, 2018
USD ($)
Sep. 30, 2024
USD ($)
Investment
Jun. 30, 2024
USD ($)
Mar. 31, 2024
Sep. 30, 2024
USD ($)
Investment
Sep. 30, 2023
USD ($)
Apr. 01, 2021
USD ($)
Related Party Transaction [Line Items]                
Carrying Value     $ 50,700,000 $ 50,200,000   $ 50,700,000    
Operating lease right of use assets     8,990,000 9,543,000   8,990,000    
Earnings from equity method investments           578,000 $ 2,709,000  
Dividends and distributions received from equity method investees           169,000 269,000  
Selling, general, and administrative expenses           26,617,000 21,845,000  
Secured Line of Credit on Wholesale Value                
Related Party Transaction [Line Items]                
Borrowings due on demand     4,800,000 0   4,800,000    
Secured Line of Credit Based on Collateral Value                
Related Party Transaction [Line Items]                
Borrowings due on demand     0 0   0    
Collectible Card Partners, LLC | Notes Payable                
Related Party Transaction [Line Items]                
Maximum borrowing               $ 4,000,000
Line of credit, termination date         Apr. 01, 2026      
Borrowings due on demand     4,000,000 4,000,000   4,000,000    
Interest expense           $ 47,000 2,000  
Silver Gold Bull, Inc.                
Related Party Transaction [Line Items]                
Dividends declared       $ 15,900,000        
Dividends received     $ 9,200,000          
Silver Gold Bull, Inc. | O2024 A Dividends                
Related Party Transaction [Line Items]                
Dividend payment month       2024-09        
Stack's Bowers Galleries | Secured Line of Credit on Wholesale Value                
Related Party Transaction [Line Items]                
Maximum borrowing   $ 10,000,000            
Percentage of royalty income   10.00%            
Initial term of loan   180 days            
Extended additional consecutive loan period   30 days            
Stack's Bowers Galleries | Secured Line of Credit Based on Collateral Value                
Related Party Transaction [Line Items]                
Maximum borrowing $ 3,000,000              
Initial term of loan 180 days              
Extended additional consecutive loan period 180 days              
Equity method investee                
Related Party Transaction [Line Items]                
Number of investments | Investment     6     6    
Related Party                
Related Party Transaction [Line Items]                
Operating lease right of use assets     $ 1,900,000 $ 2,000,000   $ 1,900,000    
Other income           200,000 300,000  
Foreign currency transactions through A-Mark for an aggregate dollar value           100,000 100,000  
Solid Crossing and Stack's Bowers Galleries | Consulting Agreement with Cerberus Limited | Leasing Agreements                
Related Party Transaction [Line Items]                
Selling, general, and administrative expenses           400,000 $ 12,000  
SGB Shareholders | Silver Gold Bull, Inc.                
Related Party Transaction [Line Items]                
Dividends received     7,500,000          
Other Shareholders | Silver Gold Bull, Inc.                
Related Party Transaction [Line Items]                
Dividend payable     $ 6,700,000 $ 8,400,000   $ 6,700,000