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Note 2 - Investments | 3 Months Ended
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Sep. 30, 2025
Notes to Financial Statements |
Investment [Text Block] | (2) Investments The following tables summarize gains and losses related to the Company’s investments as of September 30, 2025, and June 30, 2025, respectively:
|  | September 30, 2025 |
Available-for-Sale Investments |  | Adjusted |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(In thousands) |  | Cost |  |  | Gain |  |  | Loss |  |  | Value |
Mutual Funds - Corporate & Government Debt |  | $ | 7,246 |  |  | $ | — |  |  | $ | (553 | ) |  | $ | 6,693 |
ETFs - Corporate & Government Debt |  |  | 4,760 |  |  |  | — |  |  |  | (163 | ) |  |  | 4,597 |
Total |  | $ | 12,006 |  |  | $ | — |  |  | $ | (716 | ) |  | $ | 11,290 |
|  | June 30, 2025 |
Available-for-Sale Investments |  | Adjusted |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(In thousands) |  | Cost |  |  | Gain |  |  | Loss |  |  | Value |
Mutual Funds - Corporate & Government Debt |  | $ | 10,547 |  |  | $ | — |  |  | $ | (668 | ) |  | $ | 9,879 |
ETFs - Corporate & Government Debt |  |  | 5,425 |  |  |  | — |  |  |  | (196 | ) |  |  | 5,229 |
Total |  | $ | 15,972 |  |  | $ | — |  |  | $ | (864 | ) |  | $ | 15,108 |
As of September 30, 2025, and June 30, 2025, the Company had no long-term investments. For more information about the fair value of the Company’s financial instruments, see footnote 10. The following table presents the carrying amounts of certain financial instruments as of September 30, 2025, and June 30, 2025, respectively:
|  | Carrying Value |  |  | Carrying Value |
|  | Short-Term Investments |  |  | Long-Term Investments |
(In thousands) |  | September 30, 2025 |  |  | June 30, 2025 |  |  | September 30, 2025 |  |  | June 30, 2025 |
Money Market Funds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mutual Funds - Corporate & Government Debt |  | $ | 6,693 |  |  | $ | 9,879 |  |  | $ | — |  |  | $ | — |
ETFs - Corporate & Government Debt |  |  | 4,597 |  |  |  | 5,229 |  |  |  | — |  |  |  | — |
Total |  | $ | 11,290 |  |  | $ | 15,108 |  |  | $ | — |  |  | $ | — |

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