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Note 11 - Warrants (Details Textual)
Sep. 30, 2025
$ / shares
Mar. 31, 2025
$ / shares
Mar. 31, 2024
$ / shares
Apr. 11, 2023
USD ($)
$ / shares
shares
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 0 $ 0.2 $ 0.2  
Consulting Agreement [Member]        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares       100,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)       $ 0.2
Warrants and Rights Outstanding | $       $ 8,256
Warrants and Rights Outstanding, Term       24 months
Consulting Agreement [Member] | Measurement Input, Price Volatility [Member]        
Warrants and Rights Outstanding, Measurement Input       1.2352