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Significant Accounting Policies - Assets Held For Sale (Details)	12 Months Ended
	Aug. 31, 2020 USD ($) building	Aug. 31, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale, total		$ 0
Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of buildings classified as held for sale | building	3
Assets held for sale, total	$ 4,100,000

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Amount classified as assets attributable to disposal group held for sale or disposed of.

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