Basis Of Presentation And Summary Of Significant Accounting Policies (Foreign Currency) (Narrative) (Details) - USD ($)	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019
Foreign Currency Transactions [Line Items]
Foreign currency transactions gain (loss), before tax	$ 300,000	$ 400,000	$ 600,000
Unrealized foreign currency transactions	511,000	(265,000)	$ (651,000)
Foreign Currency Forward Contracts [Member]
Foreign Currency Transactions [Line Items]
Foreign currency forward contracts outstanding	3,600,000
Realized net losses	$ 0	0
Foreign currency forward contracts, Maturity date	Sep. 01, 2021
Unrealized foreign currency transactions	$ 0	$ 0