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Loans Held for Investment - Additional Information (Details)
3 Months Ended 6 Months Ended
Dec. 31, 2023
USD ($)
property
Dec. 31, 2022
USD ($)
property
Dec. 31, 2023
USD ($)
property
loan
Dec. 31, 2022
USD ($)
property
Jul. 01, 2023
USD ($)
Jun. 30, 2023
property
Fixed-rate loans as a percentage of total loans held for investment 10.00%   10.00%     11.00%
Loan interest income added to negative amortization loan balance     $ 0      
Loans and Leases Receivable, Impaired, Commitment to Lend $ 0   $ 0      
Number of Contracts | loan     0      
Interest received on non-performing loans 21,000 $ 16,000 $ 39,000 $ 23,000    
Non-performing loans interest recognized as principal payments, cost basis 0 1,000 0 3,000    
Interest income, non-performing loans, cash basis   15,000   20,000    
Total interest income recognized 21,000   39,000      
Average investment in non-performing loans $ 1,400,000 $ 1,043,000 $ 1,400,000 $ 1,080,000    
Number of Properties Acquired in Settlement of Loans | property 0 0 0 0    
Number of Previously Foreclosed Properties Sold | property 0 0 0 0    
Number Of Real Estate Owned Properties | property 0   0     0
Impact to allowance after ASC 326 adoption | ASU 2016-13            
Transition adjustment of the adoption of CECL $ 1,200,000   $ 1,200,000   $ 1,200,000  
First Trust Deed Loans            
Loans deemed uncollectible, period of delinquency     150 days      
Bankruptcy [Member]            
Loans deemed uncollectible, period of delinquency     60 days      
Troubled Debt Restructurings [Member]            
Loans deemed uncollectible, period of delinquency     90 days      
Commercial Real Estate Or Second Mortgage [Member]            
Loans deemed uncollectible, period of delinquency     120 days      
Maximum            
Segregated restructured loans, period of delinquency     90 days      
Maximum | Bankruptcy [Member]            
Allowance for loan losses, pooling method, period of delinquency     60 days