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INVENTORIES (Details) - CAD ($)
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Disclosure of Inventories [Abstract]    
Raw materials $ 153,433,000 $ 138,792,000
Work in progress 98,245,000 84,401,000
Finished goods 44,202,000 33,673,000
Current inventories 295,880,000 256,866,000
Inventory write-down 15,980,000 2,709,000
Inventories, at net realisable value 6,904,000 591,000
Cost of inventories recognised as expense during period $ 1,024,143,000 $ 912,608,000