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Property and Equipment and Capitalized Cloud-Based Software Implementation Costs (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021	Aug. 31, 2021
Machinery, Equipment And Vehicles [Member]
Business Acquisition [Line Items]
Capital costs	$ 13,500,000		$ 13,500,000		$ 30,300,000
Capitalized Cloud-Based Asset [Member]
Business Acquisition [Line Items]
Capitalized implementation costs	4,700,000		4,700,000		2,600,000
Accumulated amortization	0		0		$ 0
Amortization expense	$ 0	$ 0	$ 0	$ 0

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 1
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Amount of expense for amortization of capitalized computer software costs.

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The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Capital Costs

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