Quarterly report pursuant to Section 13 or 15(d)

Secured Loans Receivable - Additional Information (Details)

v3.23.3
Secured Loans Receivable - Additional Information (Details)
 3 Months Ended 12 Months Ended
Sep. 30, 2023
USD ($)
Loan
Sep. 30, 2022
USD ($)
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] $ 99,167,000   $ 100,620,000
Non-Performing      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Number of loans | Loan 0   0
Non-Accrual Status      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loan impairment costs $ 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
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, which are presented separately in the table below.