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Note 8 - Related Party Transactions (Details Textual) - USD ($)
12 Months Ended
Aug. 01, 2022
Jan. 01, 2017
May 31, 2025
May 31, 2024
Jun. 01, 2023
Accounts Receivable, after Allowance for Credit Loss         $ 4,857,504
TriEnda Holdings LLC [Member]          
Related Party Transaction, Purchases from Related Party     $ 81,970 $ 7,516  
Related Party Transaction, Purchases from Related Party     517,194 279,138  
Yorktown [Member] | Grinding and Pelletizing Equipment [Member]          
Weekly Rental Expenses     27,500    
Operating Lease, Expense     1,457,200 1,457,200  
Yorktown [Member] | Office Space Lease [Member]          
Operating Lease, Expense     75,000 73,950  
Lessee, Operating Lease, Term of Contract (Month)   6 years      
Monthly Rental Expense, Renewal   $ 6,250      
Greystone Real Estate L L C [Member]          
Operating Lease, Expense     534,000 534,000  
Greystone Real Estate L L C [Member] | Manufacturing Facilities Lease [Member]          
Lessee, Operating Lease, Term of Contract (Month) 10 years        
Lessee, Operating Lease, Renewal Term (Year) 5 years        
Monthly Rent Expense $ 44,500        
Monthly Rent Expense, Monthly Increase Every Fifth Year, Percent 5.00%        
TriEnda Holdings LLC [Member]          
Accounts Receivable, after Allowance for Credit Loss     617,538 143,290  
Green Plastic Pallets [Member]          
Related Party Transaction, Purchases from Related Party     367,965 240,294  
Accounts Receivable, after Allowance for Credit Loss     $ 273,345 $ 122,280