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Summary of significant accounting policies - Fixed assets estimated useful lives (Details)	12 Months Ended
	Nov. 30, 2021
Computer hardware and software
Estimated useful lives	3 years
Office furniture and equipment
Estimated useful lives	5 years
Machinery and equipment | Minimum
Estimated useful lives	P3Y
Machinery and equipment | Maximum
Estimated useful lives	10 years
Vehicles
Estimated useful lives	3 years

X

- Definition

Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 35
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123364984&loc=d3e1205-110223

+ Details

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- Details

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- Details

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- Details

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- Details

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