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 6 Months Ended
Apr. 01, 2021
USD ($)
Dec. 31, 2023
USD ($)
Investment
Dec. 31, 2022
USD ($)
Dec. 31, 2023
USD ($)
Investment
Dec. 31, 2022
USD ($)
Jun. 30, 2023
USD ($)
Jun. 27, 2022
Related Party Transaction [Line Items]              
Number of investments | Investment   7   7      
Carrying Value   $ 91,600,000   $ 91,600,000   $ 88,300,000  
Earnings from equity method investments   777,000 $ 4,669,000 3,486,000 $ 7,346,000    
Dividends and distributions received from equity method investees   0 0 269,000 551,000    
Selling, general, and administrative expenses   22,396,000 20,813,000 44,241,000 38,597,000    
Collectible Card Partners, LLC | Notes Payable              
Related Party Transaction [Line Items]              
Maximum borrowing $ 4,000,000            
Line of credit, termination date Apr. 01, 2024            
Borrowings due on demand   3,200,000   3,200,000   $ 500,000  
Interest expense   $ 10,000 8,000 $ 12,000 23,000    
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 | Subleasing Agreement              
Related Party Transaction [Line Items]              
Selling, general, and administrative expenses   $ 12,000 10,000 $ 24,000 10,000    
Equity method investee              
Related Party Transaction [Line Items]              
Number of investments | Investment   6   6      
Related Party              
Related Party Transaction [Line Items]              
Other income   $ 400,000 $ 800,000 $ 700,000 $ 1,400,000