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Note 18 - Warrant Liability (Details Textual) - $ / shares
May 31, 2024
May 31, 2023
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 5.95 $ 5.95
Percentage of Daily Cash Penalty 1.00%  
Class of Warrant or Right, Outstanding (in shares) 6,209,000 6,209,000
Fair Value, Inputs, Level 3 [Member]    
Estimated Fair Value of Warrant Liability Per Warrant (in dollars per share) $ 0.524  
Fair Value, Inputs, Level 3 [Member] | Measurement Input, Risk Free Interest Rate [Member]    
Warrants and Rights Outstanding, Measurement Input 4.04  
Fair Value, Inputs, Level 3 [Member] | Measurement Input, Price Volatility [Member]    
Warrants and Rights Outstanding, Measurement Input 0.50  
Fair Value, Inputs, Level 3 [Member] | Measurement Input, Expected Term [Member]    
Warrants and Rights Outstanding, Measurement Input 1.3  
Fair Value, Inputs, Level 3 [Member] | Measurement Input, Conversion Price [Member]    
Warrants and Rights Outstanding, Measurement Input 1.61  
Fair Value, Inputs, Level 3 [Member] | Measurement Input, Share Price [Member]    
Warrants and Rights Outstanding, Measurement Input 1.8  
Maximum [Member]    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) $ 1.61  
Warrants to Purchase Common Stock [Member]    
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) 1 1