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Note 4 - Fair Value Measurements (Tables) | 6 Months Ended
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Sep. 30, 2024
Notes Tables |
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] |
|  | September 30, 2024 |  |  | March 31, 2024 |
|  | Carrying Value |  |  | Fair Value (Level 2) |  |  | Carrying Value |  |  | Fair Value (Level 2) |
Notes |  | $ | 97,029 |  |  | $ | 94,148 |  |  | $ | 171,198 |  |  | $ | 163,013 |

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