Quarterly report pursuant to Section 13 or 15(d)

Long-Term Investments - Schedule of Carrying Value and Ownership Percentage of Investment (Parenthetical) (Details)

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Long-Term Investments - Schedule of Carrying Value and Ownership Percentage of Investment (Parenthetical) (Details)
Mar. 31, 2024
Jun. 30, 2023
AMS Holding, LLC | APS Investment, LLC    
Schedule Of Equity And Cost Method Investments [Line Items]    
Ownership percentage 10.00%  
APS Investment, LLC    
Schedule Of Equity And Cost Method Investments [Line Items]    
Ownership percentage 33.30% [1] 0.00%
APS Investment, LLC | Pinehurst Coin Exchange, Inc.    
Schedule Of Equity And Cost Method Investments [Line Items]    
Ownership percentage 33.30%  
APS Investment, LLC | Stack's Bowers Numismatics, LLC    
Schedule Of Equity And Cost Method Investments [Line Items]    
Ownership percentage 33.30%  
[1] APS Investment, LLC is a holding company that owns a 10% equity interest in AMS Holding, LLC. Pinehurst Coin Exchange, Inc. and Stack's Bowers Numismatics, LLC also each own a one-third equity interest in APS Investment, LLC.