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Note 12 - Derivative Liabilities (Tables)
3 Months Ended
Oct. 31, 2022
Notes Tables  
Schedule of Derivative Instruments [Table Text Block]

Balance, July 31, 2022

 $- 

Fair value of derivative liability assumed from UEX Acquisition (Note 3)

  8,903 

Change in fair value during the period

  2,625 

Balance, October 31, 2022

  11,528 

Derivative liabilities, current

  2,706 

Derivative liabilities, non-current

 $8,822 
Derivative Financial Instruments, Liabilities [Member]  
Notes Tables  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

Exercise Price in USD

 $1.06to

$3.25

 

Exercise Price in CAD

 CA$1.44to

CA$4.44

 

Expected Risk Free Interest Rate

 4.53%to4.48% 

Expected Volatility

 92.88%to96.99% 

Expected Life in Years

 0.55to1.85 

Expected Dividend Yield

  0.00%