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Note 3 - Equity - General and Administrative Expense - 10Q (Details) - Restricted Stock [Member] - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Mar. 31, 2025 | Mar. 31, 2024
Share-Based Payment Arrangement, Expense | $ 0 | $ 33,250 | $ 116,375 | $ 16,625
General and Administrative Expense [Member] |  |  |  |
Share-Based Payment Arrangement, Expense | $ 0 | $ 33,250 | $ 116,375 | $ 16,625

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