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Note 8 - Long Term Investments (Tables)
3 Months Ended
Aug. 31, 2025
Notes Tables  
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block]
  August 31,  May 31, 
  2025  2025 

Equity investments measured at fair value

 $2,012  $1,972 

Equity investments under measurement alternative

  8,160   8,160 

Total

 $10,172  $10,132