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Note 9 - Capital Stock and Reserve - Fair Value of Stock Option Assumptions (Details)
9 Months Ended 12 Months Ended
Dec. 31, 2023
CAD ($)
$ / shares
Mar. 31, 2023
CAD ($)
$ / shares
Statement Line Items [Line Items]    
Fair value per option | $ $ 4.07 $ 6
Exercise price (in CAD per share) | $ / shares $ 5.87 $ 11
Expected life (years) 3.5 3
Interest rate 4.22% 3.49%
Annualized volatility (based on historical volatility) 109.00% 118.00%
Dividend yield 0.00% 0.00%