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Revenue (Tables)
3 Months Ended
Aug. 31, 2025
Revenue from Contract with Customer [Abstract]  
Schedule of disaggregated revenue
        
   Quarter Ended August 31, 
   2025   2024 
Clinical trials  $24,139   $178,386 
Consulting fees        
Merchandise   61    501 
Total revenue  $24,200   $178,887