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Grant and Subsidy Income - Additional Information (Details)
$ in Thousands, € in Millions
3 Months Ended 9 Months Ended
Jan. 31, 2024
CAD ($)
Jan. 31, 2023
CAD ($)
Jan. 31, 2024
CAD ($)
Jan. 31, 2024
EUR (€)
Jan. 31, 2023
CAD ($)
Jan. 31, 2023
EUR (€)
May 31, 2022
EUR (€)
Grant And Subsidy Income [Abstract]              
Grant awarded             € 0.5
Proceeds from grants       € 0.2   € 0.2  
Grant income | $ $ 0 $ 22 $ 299   $ 306