Organization and Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
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	$ 83.2	$ 6.9
Deposits are held in various commercial banks
Cash and Cash Equivalents [Line Items]
Cash	$ 1.8	$ 0.0