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Note 4 - Investments - Reconciliation of Investments Recorded at Fair Value (Details) (Parentheticals) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023
Income Statement [Abstract] |  |
Investment Income, Net | $ 2,144 | $ 316
Statement Of Other Comprehensive Income Abstract [Domain] |  |
Other Comprehensive Income (Loss), Net of Tax | $ (764) | $ (2,276)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Investment Income, Net |
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive Income (Loss), Net of Tax |

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