Organization and Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details) - USD ($) $ in Millions	9 Months Ended
	Mar. 31, 2023	Jun. 30, 2022
Cash and Cash Equivalents [Line Items]
Term of interest bearing deposits	7 years
Interest-bearing deposits in other depository institutions
Cash and Cash Equivalents [Line Items]
Cash	$ 55.0	$ 47.3
Deposits are held in various commercial banks
Cash and Cash Equivalents [Line Items]
Cash	$ 2.2	$ 5.8