Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Aug. 31, 2021
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Realized foreign currency transactions	$ 0	$ 0
Unrealized foreign currency transactions	(541,000)	$ (52,000)
Carrying value of senior notes	112,729,000		$ 114,940,000
Assets	421,439,000		430,203,000
Liabilities	223,041,000		229,821,000
Foreign Currency Forward Contracts [Member]
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Foreign currency forward contracts outstanding	$ 1,500,000
Foreign currency forward contracts, Maturity date	Jan. 28, 2022
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
Liabilities	0
Senior Notes [Member] | Level 2 [Member]
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Fair value of senior notes	66,300,000
Carrying value of senior notes	$ 68,800,000