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Note 24 - Financial Risk Management and Financial Instruments (Details Textual)
3 Months Ended
Aug. 31, 2025
USD ($)
Aug. 31, 2024
USD ($)
May 31, 2025
USD ($)
May 31, 2024
USD ($)
Crypto Asset, Number of Units, Fractional 9.16      
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) $ (15,000,000) $ 0    
Contingent Consideration [Member] | Fair Value, Inputs, Level 3 [Member]        
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) 15,000      
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs $ 0 $ (15,000,000) $ (15,000,000) $ (15,000,000)
Maximum [Member] | SweetWater, Montauk, and Truss [Member] | Measurement Input, Probability of Achievement [Member]        
Business Combination, Contingent Consideration, Liability, Measurement Input 3      
Minimum [Member] | SweetWater, Montauk, and Truss [Member] | Measurement Input, Probability of Achievement [Member]        
Business Combination, Contingent Consideration, Liability, Measurement Input 0 100    
Bitcoin [Member]        
Crypto Asset, Number of Units, Fractional 9.16      
Long-term Debt, Excluding Convertible Debentures [Member]        
Long-Term Debt, Percentage Bearing Fixed Interest, Amount $ 2,437,000     2,546,000
Convertible Debt [Member]        
Convertible Debt $ 100,000,000     $ 105,000,000