Inventory - Components of Inventory (Details) - CAD ($) $ in Thousands	Sep. 30, 2022	Mar. 31, 2022
Inventory Disclosure [Abstract]
Raw materials, packaging supplies and consumables	$ 31,270	$ 26,821
Work in progress	59,880	65,245
Finished goods	120,059	112,321
Inventory	$ 211,209	$ 204,387