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Note 3 - Investments (Tables) | 12 Months Ended
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Sep. 30, 2023
Notes Tables |
Investment Holdings, Schedule of Investments [Table Text Block] |
|  | Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Total |
|  | (In thousands) |
2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mutual fund investments |  | $ | 4 |  |  | $ | 26 |  |  | $ | (20 | ) |  | $ | 10 |
Total |  |  | 4 |  |  |  | 26 |  |  |  | (20 | ) |  |  | 10 |
2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mutual fund investments |  | $ | 4 |  |  | $ | 24 |  |  | $ | (19 | ) |  | $ | 9 |
Total |  |  | 4 |  |  |  | 24 |  |  |  | (19 | ) |  |  | 9 |

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