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Note 6 - Leases (Details Textual) - USD ($)
12 Months Ended
May 31, 2025
May 31, 2024
Feb. 28, 2025
Jan. 01, 2024
Finance Lease, Right-of-Use Asset, Amortization $ 4,887 $ 24,312    
Operating Lease, Liability 5,168,301 5,453,234    
Equipment One [Member]        
Finance Lease, Right-of-Use Asset, Amortization $ 4,887 $ 24,312    
Lessee, Operating Lease, Term of Contract (Month) 52 months      
Equipment Two [Member]        
Lessee, Operating Lease, Term of Contract (Month) 48 months      
Lessee, Operating Lease, Discount Rate 5.40%      
Two Buildings [Member]        
Lessee, Operating Lease, Term of Contract (Month)     10 months  
Lessee, Operating Lease, Discount Rate 6.00%      
Lessee, Operating Lease, Renewal Term (Year) 5 years      
Corporate Offices [Member]        
Lessee, Operating Lease, Term of Contract (Month) 6 months      
Lessee, Operating Lease, Discount Rate 8.50%      
Related Party Lease Agreement [Member]        
Lessee, Operating Lease, Term of Contract (Month)       6 years
Lessee, Operating Lease, Discount Rate       8.50%
Lessee, Operating Lease, Renewal Term (Year)       5 years
Operating Lease, Liability       $ 354,041
Lessee, Operating Lease, Remaining Lease Term (Year)       72 years