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Leases - Schedule of Changes in the Value of the Right-of-Use Assets (Details) - CAD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Jan. 31, 2024
Apr. 30, 2023
Cost    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance $ 9,252 $ 3,476
Additions 7,963 7,593
Disposals (88) (2,072)
Foreign exchange (249) 255
Ending balance 16,878 9,252
Accumulated Depreciation    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 1,809 2,242
Depreciation 1,136 1,365
Disposals (61) (1,838)
Foreign exchange (50) 40
Ending balance 2,834 1,809
Net Book Value    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 7,443  
Ending balance 14,044 7,443
Building | Cost    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 9,085 2,586
Additions 7,963 7,593
Disposals (88) (1,290)
Foreign exchange (245) 196
Ending balance 16,715 9,085
Building | Accumulated Depreciation    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 1,752 1,736
Depreciation 1,094 1,109
Disposals (61) (1,274)
Foreign exchange (48) 181
Ending balance 2,737 1,752
Building | Net Book Value    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 7,333  
Ending balance 13,978 7,333
Automobile | Cost    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 167 239
Additions 0 0
Disposals 0 (95)
Foreign exchange (4) 23
Ending balance 163 167
Automobile | Accumulated Depreciation    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 57 46
Depreciation 42 58
Disposals 0 (57)
Foreign exchange (2) 10
Ending balance 97 57
Automobile | Net Book Value    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 110  
Ending balance 66 110
Lab Equipment | Cost    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 0 651
Additions 0 0
Disposals 0 (687)
Foreign exchange 0 36
Ending balance 0 0
Lab Equipment | Accumulated Depreciation    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 0 460
Depreciation 0 198
Disposals 0 (507)
Foreign exchange 0 (151)
Ending balance 0 0
Lab Equipment | Net Book Value    
Disclosure of quantitative information about right-of-use assets [line items]    
Beginning balance 0  
Ending balance $ 0 $ 0