Property And Equipment (Narrative) (Details) - USD ($) $ in Millions	Nov. 30, 2021	Aug. 31, 2021
Machinery, Equipment And Vehicles [Member]
Business Acquisition [Line Items]
Capital costs	$ 13.5	$ 30.3

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.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration