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Note 3 - Acquisition of UEX (Tables)
12 Months Ended
Jul. 31, 2025
Notes Tables  
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
  

Year Ended July 31,

 
  

2025

  

2024

  

2023(1

)

Expected Risk Free Interest Rate

  3.81%  4.05%  4.14%

Expected Volatility

  75.66%  78.83%  79.43%

Expected Life in Years

  5.00   5.00   4.90 

Expected Dividend Yield

  0%  0%  0%

Weighted-Average Grant Date Fair Value

 $4.88  $3.71  $2.18 
UEX Acquisition [Member]  
Notes Tables  
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Exercise Price in U.S. dollars

 

1.1111 to3.424242

 

Exercise Price in Canadian dollars

 

CA$1.44 to CA$4.44

 

Expected Risk Free Interest Rate

 3.18% to 3.23% 

Expected Volatility

 90.98% to 101.52% 

Expected Life in Years

 0.75 to 2.05 

Expected Dividend Yield

 0.00%