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Note 3 - Investments - Unrealized Gains and Losses (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Net gains and losses recognized during the period |  | $ (281) | $ (1,176)
Less: Net gains and losses recognized during the period on securities sold during the period |  | (17) | (266)
Unrealized gains and losses recognized during the reporting period on securities still held at the reporting date (1) | [1] | (264) | (910)
Net gains and losses recognized during the period |  | (146) | (7)
Less: Net gains and losses recognized during the period on securities sold during the period |  | 0 | 0
Corporate debt securities, Unrealized gains (losses) |  | $ (146) | $ (7)
[1] | Includes net unrealized and realized losses as a result of the measurement alternative of $362,000 and $1.0 million for the fiscal years ended June 30, 2025, and 2024, respectively.

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- Definition Amount of unrealized and realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (FV-NI). + References No definition available. + Details
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