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Note 11 - Fair Value of Financial Instruments (Tables) | 12 Months Ended
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Mar. 31, 2025
Notes Tables |
Fair Value, by Balance Sheet Grouping [Table Text Block] |
|  | As of: |
|  | March 31, 2025 |  |  | March 31, 2024 |
Carrying value |  | $ | 369,878 |  |  | $ | 604,786 |
Estimated fair value |  | $ | 364,276 |  |  | $ | 599,408 |

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