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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