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Plant and Equipment - Schedule of plant and equipment (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Sep. 30, 2024
Mar. 31, 2024
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance $ 95,356  
Ending balance 115,220 $ 95,356
Cost [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 322,192 256,378
Disposals (37,048) (5,584)
Additions 48,383 69,735
Atlantic acquisition   2,119
Foreign exchange on translation 975 (456)
Ending balance 334,502 322,192
Accumulated depreciation and impairment [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 226,836 169,150
Disposals (36,834) (4,784)
Depreciation 28,473 63,532
Foreign exchange on translation 807 (1,062)
Ending balance 219,282 226,836
Equipment [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 71,209  
Ending balance 91,425 71,209
Equipment [Member] | Cost [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 292,993 229,187
Disposals (37,048) (5,584)
Additions 47,686 69,360
Atlantic acquisition   446
Foreign exchange on translation 871 (416)
Ending balance 304,502 292,993
Equipment [Member] | Accumulated depreciation and impairment [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 221,784 166,236
Disposals (36,834) (4,784)
Depreciation 27,294 61,302
Foreign exchange on translation 833 (970)
Ending balance 213,077 221,784
Land [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 749  
Ending balance 981 749
Land [Member] | Cost [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 749 663
Disposals 0 0
Additions 232 0
Atlantic acquisition   86
Foreign exchange on translation 0 0
Ending balance 981 749
Land [Member] | Accumulated depreciation and impairment [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 0 0
Disposals 0 0
Depreciation 0 0
Foreign exchange on translation 0 0
Ending balance 0 0
Buildings and Leasehold [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 23,398  
Ending balance 22,814 23,398
Buildings and Leasehold [Member] | Cost [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 28,450 26,528
Disposals 0 0
Additions 465 375
Atlantic acquisition   1,587
Foreign exchange on translation 104 (40)
Ending balance 29,019 28,450
Buildings and Leasehold [Member] | Accumulated depreciation and impairment [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 5,052 2,914
Disposals 0 0
Depreciation 1,179 2,230
Foreign exchange on translation (26) (92)
Ending balance $ 6,205 $ 5,052