Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - Additional Information (Details)

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Related Party Transactions - Additional Information (Details)
3 Months Ended 9 Months Ended
Apr. 01, 2021
USD ($)
Mar. 31, 2024
USD ($)
Investment
Mar. 31, 2023
USD ($)
Mar. 31, 2024
USD ($)
Investment
Mar. 31, 2023
USD ($)
Jun. 30, 2023
USD ($)
Jun. 27, 2022
Related Party Transaction [Line Items]              
Number of investments | Investment   8   8      
Carrying Value   $ 93,500,000   $ 93,500,000   $ 88,300,000  
Earnings (losses) from equity method investments   (206,000) $ (70,000) 3,280,000 $ 7,276,000    
Dividends and distributions received from equity method investees   100,000 0 361,000 551,000    
Selling, general, and administrative expenses   22,854,000 23,841,000 67,095,000 62,438,000    
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   $ 500,000  
Interest expense   $ 20,000 9,000 $ 32,000 32,000    
Silver Gold Bull, Inc.              
Related Party Transaction [Line Items]              
Business acquisition, option to purchase additional percentage of the outstanding equity   27.60%   27.60%   27.60% 27.60%
Business acquisition, percentage of interests acquired   40.00%   40.00%     40.00%
Fair value of option to purchase investment   $ 5,300,000   $ 5,300,000   $ 5,300,000  
Exercise of option to acquire additional ownership interest start month and year       2023-12      
Exercise of option to acquire additional ownership interest end month and year       2024-09      
Stack's Bowers Galleries | Consulting Agreement with Cerberus Limited | Subleasing Agreement              
Related Party Transaction [Line Items]              
Selling, general, and administrative expenses   $ 66,000 12,000 $ 90,000 22,000    
Equity method investee              
Related Party Transaction [Line Items]              
Number of investments | Investment   7   7      
Related Party              
Related Party Transaction [Line Items]              
Other income   $ 400,000 $ 600,000 $ 1,000,000 $ 2,000,000