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Note 8 - Long Term Investments (Details Textual) - USD ($)
Aug. 31, 2025
May 31, 2024
Equity Securities without Readily Determinable Fair Value, Amount $ 8,160,000 $ 8,160,000
Superhero Acquisition LP [Member]    
Equity Securities without Readily Determinable Fair Value, Amount $ 8,160,000 $ 8,160
Superhero Acquisition LP [Member] | Upon U.S. Federal Cannabis Legalization [Member]    
Subsidiary, Ownership Percentage, Parent 68.00% 68.00%
Equity Investment, Strike Price (in dollars per share) $ 1 $ 1