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Share Capital - Additional Information (Details) - CAD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Jan. 31, 2024
Jan. 31, 2023
Jan. 31, 2024
Jan. 31, 2023
Apr. 30, 2023
Disclosure Of Classes Of Share Capital [Line Items]          
Shares issued pursuant to option exercise, shares   30,000   178,725  
Number of options, Exercised         318,725
Shares issued pursuant to option exercise   $ (97)   $ (715)  
Number of underwritten public offering shares     1,265,000    
Number of shares exercise by underwriter of over allotment option     165,000    
Public offering price for each common share $ 1   $ 1    
Share-based payments $ 1,001 193 $ 1,298 1,307  
Share Capital          
Disclosure Of Classes Of Share Capital [Line Items]          
Shares issued pursuant to option exercise   (170)   (1,247)  
Share Capital | Common Shares          
Disclosure Of Classes Of Share Capital [Line Items]          
Shares issued pursuant to option exercise, shares         263,537
Total gross proceeds from exercise of stock options         $ 700
Shares issued pursuant to option exercise         $ 800
Shares issued pursuant to conversion of convertible debentures, Number of Shares         309,877
Convertible debentures         $ 1,300
Debt conversion principal debt amount         $ 1,300
Contributed Surplus          
Disclosure Of Classes Of Share Capital [Line Items]          
Shares issued pursuant to option exercise   $ 73   $ 532