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Significant accounting policies (Details)	3 Months Ended
Significant accounting policies (Details)	Nov. 30, 2021
Farm facility and equipment [Member] \| Minimum [Member]
Estimated useful lives	1 year
Farm facility and equipment [Member] \| Maximum [Member]
Estimated useful lives	10 years
Office and Computer Equipment [Member] \| Minimum [Member]
Estimated useful lives	5 years
Office and Computer Equipment [Member] \| Maximum [Member]
Estimated useful lives	10 years
Land Equipment [Member]
Estimated useful lives	10 years