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Property and Equipment - Summary of Changes in the Value of Property and Equipment (Details) - CAD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Jan. 31, 2024
Apr. 30, 2023
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance $ 10,392  
Ending balance 16,548 $ 10,392
Cost    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 16,742 9,206
Additions 8,324 8,924
Completion of work-in-process   0
Disposals (89) (2,088)
Foreign exchange (380) 700
Ending balance 24,597 16,742
Accumulated Depreciation    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance (6,350) (5,647)
Depreciation 1,887 2,271
Disposals 61 1,841
Foreign exchange (127) 273
Ending balance (8,049) (6,350)
Net Book Value    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 10,392  
Ending balance 16,548 10,392
Computer Hardware | Cost    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 288 136
Additions 49 138
Completion of work-in-process   0
Disposals (1) (3)
Foreign exchange (6) 17
Ending balance 330 288
Computer Hardware | Accumulated Depreciation    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance (157) (70)
Depreciation 77 84
Disposals 0 3
Foreign exchange (3) 6
Ending balance (231) (157)
Computer Hardware | Net Book Value    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 131  
Ending balance 99 131
Furniture and Equipment | Cost    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 53 35
Additions 0 0
Completion of work-in-process   0
Disposals 0 0
Foreign exchange (1) 18
Ending balance 52 53
Furniture and Equipment | Accumulated Depreciation    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance (33) (29)
Depreciation 3 3
Disposals 0 0
Foreign exchange 0 1
Ending balance (36) (33)
Furniture and Equipment | Net Book Value    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 20  
Ending balance 16 20
Computer Software | Cost    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 50 47
Additions 0 0
Completion of work-in-process   0
Disposals 0 0
Foreign exchange (1) 3
Ending balance 49 50
Computer Software | Accumulated Depreciation    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance (50) (47)
Depreciation 0 0
Disposals 0 0
Foreign exchange (1) 3
Ending balance (49) (50)
Computer Software | Net Book Value    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 0  
Ending balance 0 0
Building | Cost    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 9,085 2,586
Additions 7,963 7,593
Completion of work-in-process   0
Disposals (88) (1,290)
Foreign exchange (245) 196
Ending balance 16,715 9,085
Building | Accumulated Depreciation    
Disclosure Of Property Plant And Equipment [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 Property Plant And Equipment [Line Items]    
Beginning balance 7,333  
Ending balance 13,978 7,333
Automobile | Cost    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 167 239
Additions 0 0
Completion of work-in-process   0
Disposals 0 (95)
Foreign exchange (4) 23
Ending balance 163 167
Automobile | Accumulated Depreciation    
Disclosure Of Property Plant And Equipment [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 Property Plant And Equipment [Line Items]    
Beginning balance 110  
Ending balance 66 110
Leasehold Improvements | Cost    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 626 353
Additions 27 101
Completion of work-in-process   166
Disposals 0 0
Foreign exchange (3) 6
Ending balance 650 626
Leasehold Improvements | Accumulated Depreciation    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance (388) (348)
Depreciation 42 40
Disposals 0 0
Foreign exchange 0 0
Ending balance (430) (388)
Leasehold Improvements | Net Book Value    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 238  
Ending balance 220 238
Lab Equipment | Cost    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 6,473 5,672
Additions 259 1,064
Completion of work-in-process   0
Disposals 0 (700)
Foreign exchange (120) 437
Ending balance 6,612 6,473
Lab Equipment | Accumulated Depreciation    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance (3,913) (3,371)
Depreciation 629 977
Disposals 0 507
Foreign exchange (73) 72
Ending balance (4,469) (3,913)
Lab Equipment | Net Book Value    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 2,560  
Ending balance 2,143 2,560
WIP - Leasehold Improvements | Cost    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 0 138
Additions 26 28
Completion of work-in-process   (166)
Disposals 0 0
Foreign exchange 0 0
Ending balance 26 0
WIP - Leasehold Improvements | Accumulated Depreciation    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 0 0
Depreciation 0 0
Disposals 0 0
Foreign exchange   0
Ending balance 0 0
WIP - Leasehold Improvements | Net Book Value    
Disclosure Of Property Plant And Equipment [Line Items]    
Beginning balance 0  
Ending balance $ 26 $ 0