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Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Aug. 31, 2022
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Realized foreign currency transactions	$ 0	$ 0
Unrealized foreign currency transactions	1,481,000	$ (541,000)
Carrying value of senior notes	107,902,000		$ 107,139,000
Assets	441,493,000		434,295,000
Liabilities	250,123,000		245,671,000
Foreign Currency Forward Contracts [Member]
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Foreign currency forward contracts outstanding	0
Unrealized foreign currency transactions	0		$ 0
Level 2 [Member] | Recurring [Member]
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Assets	0
Liabilities	0
Level 2 [Member] | Nonrecurring [Member]
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Assets	0
Senior Notes [Member] | Level 2 [Member]
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Fair value of senior notes	60,800,000
Carrying value of senior notes	$ 68,000,000.0

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