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Note 9 - Investments in Equity Securities (Tables)
9 Months Ended
Apr. 30, 2023
Notes Tables  
Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block]

Balance, July 31, 2022

 $14,834 

Transferred as consideration for UEX Acquisition (Note 3)

  (5,830)

Acquired from UEX Acquisition (Note 3)

  135 

Additions

  42,219 

Loss on revaluation of equity securities

  (12,992)

Foreign exchange difference

  (5)

Balance, April 30, 2023

 $38,361