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Share Capital - Summary of Stock Option Awards (Details)
$ / shares in Units, $ in Millions
 9 Months Ended
Jan. 31, 2024
CAD ($)
shares
yr
$ / shares
May 15, 2022 | Employees  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Grant date May 15, 2022 [1]
Stock options granted | shares 80,000 [1]
Exercisable price/option $ 5.79 [1]
Awarded to Employees [1]
Share price on grant date $ 5.79 [1]
Dividend yield 0.00% [1]
Expected volatility 77.00% [1]
Risk- free rate 2.73% [1]
Expected life | yr 5 [1]
Fair value | $ $ 0.3 [1]
February 19, 2023 | Directors  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Grant date February 19, 2023 [2]
Stock options granted | shares 29,060 [2]
Exercisable price/option $ 4.1 [2],[3]
Awarded to Directors [2]
Share price on grant date $ 4.1 [2],[3]
Dividend yield 0.00% [2]
Expected volatility 77.00% [2]
Risk- free rate 3.57% [2]
Expected life | yr 4 [2]
Fair value | $ $ 0.1 [2]
February 19, 2023 | Officers and employee  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Grant date February 19, 2023 [1]
Stock options granted | shares 609,452 [1]
Exercisable price/option $ 4.1 [1],[3]
Awarded to Officers and employees [1]
Share price on grant date $ 4.1 [1],[3]
Dividend yield 0.00% [1]
Expected volatility 77.00% [1]
Risk- free rate 3.57% [1]
Expected life | yr 5 [1]
Fair value | $ $ 2.2 [1]
January 19, 2024 | Directors  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Grant date January 19, 2024 [4]
Stock options granted | shares 160,000 [4]
Exercisable price/option $ 1.48 [3],[4]
Awarded to Directors [4]
Share price on grant date $ 1.48 [3],[4]
Dividend yield 0.00% [4]
Expected volatility 77.00% [4]
Risk- free rate 3.64% [4]
Expected life | yr 5 [4]
Fair value | $ $ 0.2 [4]
January 19, 2024 | Directors One  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Grant date January 19, 2024 [5]
Stock options granted | shares 80,000 [5]
Exercisable price/option $ 1.48 [3],[5]
Awarded to Directors [5]
Share price on grant date $ 1.48 [3],[5]
Dividend yield 0.00% [5]
Expected volatility 77.00% [5]
Risk- free rate 3.64% [5]
Expected life | yr 5 [5]
Fair value | $ $ 0.1 [5]
[1] Vesting conditions are as follows: one-third 6 months after grant date; one-third 12 months after grant date; and one-third 18 months after grant date.
[2] Vesting conditions are as follows: one-quarter 3 months after grant date; one-quarter 6 months after grant date; one-quarter 9 months after grant date; and one-quarter 12 months after grant date.
[3] Priced in US dollars
[4] Vesting conditions are as follows: one-thirty-sixth each month after grant date.
[5] Vesting conditions are as follows: all vest 10 months after grant date.