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Significant accounting policies (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2020

Sep. 30, 2022

Disclosure Of Significant Accounting Policies [Abstract]

Disclosure of detailed information about estimated useful lives of property and equipment [Table Text Block]

Property and equipment		Rate
Computer equipment		5 years
Computer software		3 years
Office furniture and equipment		5 years
R&D equipment		5 years
Leasehold improvements		Shorter of useful life or remaining term of lease

	Rate
Computer equipment	3 years
Computer software	3 years
Office furniture and equipment	5 years
Low-rate initial production equipment	5 years
R&D equipment	5 years
Sales demo equipment	2 years
Leasehold improvements	Shorter of useful life or remaining term of lease