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Commitments and Contingencies - Additional Information (Details) - USD ($)
3 Months Ended 12 Months Ended
Sep. 12, 2017
Sep. 30, 2019
Sep. 30, 2018
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Loss Contingencies            
Legal Fees $ 2,800,000          
Total settlement expense   $ 2,500,000 $ 2,800,000      
Settlement expense recovery   $ 296,000        
Operating Leases, Rent Expense       $ 1,700,000 $ 3,900,000  
Recourse liability       270,000 250,000 $ 283,000
Other Investors            
Loss Contingencies            
Recourse liability       200,000 200,000  
Mortgage Partnership Finance (MPF) Program            
Loss Contingencies            
Recourse liability       $ 70,000 $ 50,000