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Share Capital - Summary of Options Outstanding (Details)
 9 Months Ended
Jan. 31, 2024
shares
$ / shares
Jan. 31, 2024
shares
$ / shares
Apr. 30, 2023
shares
Apr. 30, 2022
shares
Disclosure Of Classes Of Share Capital [Line Items]        
Exercise price | $ / shares $ 7.52      
Remaining life (year) 3 years 2 months 19 days      
Options outstanding 1,622,530 1,622,530 1,884,428 1,624,150
Unvested 537,444 537,444    
Vested 1,085,086 1,085,086    
Option Expiry Date September 1, 2025        
Disclosure Of Classes Of Share Capital [Line Items]        
Expiry Date September 1, 2025      
Exercise price | $ / shares $ 8.5      
Remaining life (year) 1 year 7 months 2 days      
Options outstanding 250,000 250,000    
Unvested 0 0    
Vested 250,000 250,000    
Option Expiry Date January 6, 2026        
Disclosure Of Classes Of Share Capital [Line Items]        
Expiry Date January 6, 2026      
Exercise price | $ / shares $ 20.3      
Remaining life (year) 1 year 11 months 4 days      
Options outstanding 168,000 168,000    
Unvested 0 0    
Vested 168,000 168,000    
Option Expiry Date May 9, 2026        
Disclosure Of Classes Of Share Capital [Line Items]        
Expiry Date May 9, 2026      
Exercise price | (per share) $ 10.32 [1] $ 7.72    
Remaining life (year) [1] 2 years 3 months 7 days      
Options outstanding [1] 10,000 10,000    
Unvested [1] 3,333 3,333    
Vested [1] 6,667 6,667    
Option Expiry Date January 2, 2026        
Disclosure Of Classes Of Share Capital [Line Items]        
Expiry Date January 2, 2026      
Exercise price | $ / shares $ 6.89      
Remaining life (year) 1 year 11 months 1 day      
Options outstanding 28,250 28,250    
Unvested 0 0    
Vested 28,250 28,250    
Option Expiry Date January 7, 2027        
Disclosure Of Classes Of Share Capital [Line Items]        
Expiry Date January 7, 2027      
Exercise price | $ / shares $ 7.94      
Remaining life (year) 2 years 11 months 8 days      
Options outstanding 276,000 276,000    
Unvested 0 0    
Vested 276,000 276,000    
Option Expiry Date January 13, 2027        
Disclosure Of Classes Of Share Capital [Line Items]        
Expiry Date January 13, 2027      
Exercise price | $ / shares $ 8.3      
Remaining life (year) 2 years 11 months 12 days      
Options outstanding 31,000 31,000    
Unvested 0 0    
Vested 31,000 31,000    
Option Expiry Date February 22, 2024        
Disclosure Of Classes Of Share Capital [Line Items]        
Expiry Date February 22, 2024      
Exercise price | $ / shares $ 6.35      
Remaining life (year) 21 days      
Options outstanding 25,000 25,000    
Unvested 0 0    
Vested 25,000 25,000    
Option Expiry Date May 15, 2027        
Disclosure Of Classes Of Share Capital [Line Items]        
Expiry Date May 15, 2027      
Exercise price | $ / shares $ 5.79      
Remaining life (year) 3 years 3 months 14 days      
Options outstanding 80,000 80,000    
Unvested 0 0    
Vested 80,000 80,000    
Option Expiry Date February 19, 2027        
Disclosure Of Classes Of Share Capital [Line Items]        
Expiry Date February 19, 2027      
Exercise price | $ / shares [2] $ 5.48      
Remaining life (year) [2] 3 years 18 days      
Options outstanding [2] 18,161 18,161    
Unvested [2] 0 0    
Vested [2] 18,161 18,161    
Option Expiry Date February 19, 2028        
Disclosure Of Classes Of Share Capital [Line Items]        
Expiry Date February 19, 2028      
Exercise price | $ / shares [2] $ 5.48      
Remaining life (year) [2] 4 years 18 days      
Options outstanding [2] 496,119 496,119    
Unvested [2] 316,968 316,968    
Vested [2] 179,151 179,151    
Option Expiry Date January 19, 2029        
Disclosure Of Classes Of Share Capital [Line Items]        
Expiry Date January 19, 2029      
Exercise price | (per share) $ 1.98 [3] $ 1.48    
Remaining life (year) [3] 4 years 11 months 19 days      
Options outstanding [3] 240,000 240,000    
Unvested [3] 217,143 217,143    
Vested [3] 22,857 22,857    
[1] Exercise price of US $7.72. The figure in the table above is translated at the January 31, 2024 rate.
[2] Exercise price of US $4.10. The figure in the table above is translated at the January 31, 2024 rate.
[3] Exercise price of US $1.48. The figure in the table above is translated at the January 31, 2024 rate.