v3.26.3
Note 8 - Long-term Investments (Tables)
3 Months Ended
Aug. 31, 2026
Notes Tables  
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block]
  August 31,  May 31, 
  2026  2026 

Equity investments measured at fair value using quoted prices in active markets (Level 1)

 $1,025  $1,197 

Equity investments measured at fair value using other observable inputs (Level 2)

  976   990 

Equity investments under measurement alternative (Level 3)

  4,364   4,364 

Total

 $6,365  $6,551