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Organization and Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Cash and Cash Equivalents [Line Items]    
Term of interest bearing deposits 3 years  
Interest-bearing deposits in other depository institutions    
Cash and Cash Equivalents [Line Items]    
Cash $ 3.8 $ 47.3
Deposits are held in various commercial banks    
Cash and Cash Equivalents [Line Items]    
Cash $ 1.3 $ 5.8