Quarterly report pursuant to Section 13 or 15(d)

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

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Long-Term Investments - Schedule of Carrying Value and Ownership Percentage of Investment (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Jun. 30, 2024
Schedule Of Equity And Cost Method Investments [Line Items]    
Carrying Value $ 50,700 $ 50,200
Carrying Value 51,005 50,458
Pinehurst Coin Exchange, Inc.    
Schedule Of Equity And Cost Method Investments [Line Items]    
Carrying Value $ 17,998 $ 17,503
Ownership Percentage 49.00% 49.00%
Sunshine Minting, Inc.    
Schedule Of Equity And Cost Method Investments [Line Items]    
Carrying Value $ 18,000 $ 18,603
Ownership Percentage 44.90% 44.90%
Company A    
Schedule Of Equity And Cost Method Investments [Line Items]    
Carrying Value $ 283 $ 283
Ownership Percentage 33.30% 33.30%
Company B    
Schedule Of Equity And Cost Method Investments [Line Items]    
Carrying Value $ 2,064 $ 2,036
Ownership Percentage 50.00% 50.00%
Texas Precious Metals, LLC    
Schedule Of Equity And Cost Method Investments [Line Items]    
Carrying Value $ 7,689 $ 7,236
Ownership Percentage 12.00% 12.00%
Atkinsons Bullion & Coins    
Schedule Of Equity And Cost Method Investments [Line Items]    
Carrying Value $ 2,965 $ 2,783
Ownership Percentage 25.00% 25.00%
APS Investment, LLC    
Schedule Of Equity And Cost Method Investments [Line Items]    
Carrying Value [1] $ 2,006 $ 2,014
Ownership Percentage [1] 33.30% 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.