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Commitments and contingencies - Schedule of performance milestones (Details) - Amended and restated licensing agreement [Member] - Aerialx Technology [Member] $ in Millions	12 Months Ended
	Sep. 30, 2022 CAD ($) shares
First milestone [Member]
Disclosure of contingent liabilities [line items]
Number of Common Shares | shares	1,071
Milestone, amount in sales | $	$ 3
Second milestone [Member]
Disclosure of contingent liabilities [line items]
Number of Common Shares | shares	1,429
Milestone, amount in sales | $	$ 9
Third milestone [Member]
Disclosure of contingent liabilities [line items]
Number of Common Shares | shares	1,786
Milestone, amount in sales | $	$ 18

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- Definition

Represents number of common share issued to achieve performance milestones.

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Represents amount of performance milestones in amounts of sales

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