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Summary of significant accounting policies - Fixed assets estimated useful lives (Details) | 12 Months Ended
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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

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- 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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