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Note 7 - Equity-accounted Investment (Tables)
6 Months Ended
Jan. 31, 2019
Notes Tables  
Equity Method Investments [Table Text Block]
Balance, July 31, 2018
  $
693,502
 
Consideration Shares received from sale of royalty interests
   
9,077,842
 
Share of loss from URC
   
(74,742
)
Gain on ownership interest dilution
   
356,774
 
Gain from foreign currency translation
   
38,232
 
Balance, January 31, 2019
 
$
10,091,608