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Investments - Schedule of Available-for-Sale Securities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Jun. 30, 2021
Schedule Of Available For Sale Securities [Line Items]    
Adjusted Cost $ 27,374 $ 27,374
Unrealized Gain 0 0
Unrealized Loss (268) (23)
Fair Value 27,106 27,351
Mutual Funds - Corporate & Government Debt    
Schedule Of Available For Sale Securities [Line Items]    
Adjusted Cost 19,998 19,998
Unrealized Gain 0 0
Unrealized Loss (179) (13)
Fair Value 19,819 19,985
ETFs - Corporate & Government Debt    
Schedule Of Available For Sale Securities [Line Items]    
Adjusted Cost 7,376 7,376
Unrealized Gain 0 0
Unrealized Loss (89) (10)
Fair Value $ 7,287 $ 7,366