Quarterly report pursuant to Section 13 or 15(d)

Secured Loans Receivable - Additional Information (Details)

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Secured Loans Receivable - Additional Information (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2023
USD ($)
Loan
Dec. 31, 2022
USD ($)
Dec. 31, 2023
USD ($)
Loan
Dec. 31, 2022
USD ($)
Jun. 30, 2023
USD ($)
Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Loans receivable average effective rate of interest (percentage)     10.40%   10.40%
Loan collateral values updated period frequency     90 days    
Loans receivable payment terms for interest     180 days    
Loan receivable liquidation period post default     20 days    
Loans with loan-to-value [1] $ 106,565,000   $ 106,565,000   $ 100,620,000
Non-Performing          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Number of loans | Loan 0   0   0
Non-Accrual Status          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Loan impairment costs $ 0 $ 0 $ 0 $ 0  
Loan-to-value Ratio in Excess of 100%          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Loans with loan-to-value $ 0   $ 0   $ 0
Maximum          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Percentage of loan balance outstanding     85.00%    
Bullion          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Percentage of Loan-to-value ratio     75.00%    
Graded Sports Cards and Sports Memorabilia          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Percentage of Loan-to-value ratio     50.00%    
Numismatic and Semi-numismatic          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Percentage of Loan-to-value ratio     65.00%    
[1] Includes amounts of the consolidated variable interest entity as of June 30, 2023, which are presented separately in the table below.