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Investments in Debt and Equity Securities (Components of Investments in Debt Securities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Jun. 30, 2022
Investments in Debt and Equity Securities [Abstract]    
Adjusted cost $ 7,793 $ 11,029
Gross unrealized losses (194) (184)
Fair value $ 7,599 $ 10,845