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Note 1 - Summary of Significant Accounting Policies (Tables)
12 Months Ended
May 31, 2024
Notes Tables  
Schedule of Useful Life of Property Plant and Equipment [Table Text Block]
    Years  

Plant buildings

    39    

Production machinery and equipment

  5 - 12  

Leasehold improvements

  5 - 7  

Furniture & fixtures

  3 - 5