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Basis of Presentation, Summary of Significant Accounting Policies and Change in Accounting Principle - Notes Receivable (Details) - Current Customer - USD ($)
Mar. 31, 2020
Jun. 30, 2019
Implementation Fund Loan | Loans Payable    
Short-term Debt [Line Items]    
Face amount   $ 40,000,000.0
Interest rate 6.50%  
Notes Receivable | Surplus Note    
Short-term Debt [Line Items]    
Loans and leases receivable, net amount $ 40,000,000.0  
Interest receivable $ 2,000,000.0