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Directors Fees - Additional Information (Details) - USD ($)
12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]      
Directors' fees $ 302,500 $ 302,500 $ 312,500
Directors' fees payable 15,755 $ 20,780  
Independent Director      
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]      
Annual fees 75,000    
Reimbursement expense 2,500    
Board of Directors Chairman      
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]      
Reimbursement expense 1,000    
Chair Person Of Audit Committee      
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]      
Annual fees 7,500    
Valuation Committee      
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]      
Annual fees 2,500    
Nominating And Corporate Governance Committee      
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]      
Annual fees 2,500    
Compensation Committee      
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]      
Annual fees $ 2,500