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Note 7 - Revenue (Details Textual) - USD ($)
12 Months Ended
May 31, 2024
May 31, 2023
Jun. 01, 2024
Contract with Customer, Liability $ 840,945 $ 23,007  
Contract with Customer, Liability, Revenue Recognized Including Opening Balance 0 5,842,040  
Subsequent Event [Member]      
Contract with Customer, Liability     $ 5,329,047
Accounts Receivable, after Allowance for Credit Loss     $ 6,001,049
Pallets [Member]      
Contract with Customer, Liability, Revenue Recognized $ 818,000 $ 536,000  
Geographic Concentration Risk [Member] | Revenue, Segment Benchmark [Member] | Canada and Mexico [Member]      
Concentration Risk, Percentage 1.60% 0.84%