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Note 19 - Fair Value Gain (Loss) on Equity Securities (Tables)
12 Months Ended
Jul. 31, 2024
Notes Tables  
Unrealized Gain (Loss) on Investments [Table Text Block]
  

Year Ended July 31,

 
  

2024

  

2023

  

2022

 

Unrealized and realized gain (loss) from common shares and warrants of publicly listed companies

 $27,505  $(11,999) $(1,351)

Realized loss from investment in UEX shares transferred as consideration for UEX Acquisition

  -   (1,084)  - 

Total

 $27,505  $(13,083) $(1,351)