Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021	Aug. 31, 2021
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Realized foreign currency transactions	$ 0	$ 0	$ 0	$ 0
Unrealized foreign currency transactions			(261,000)	$ 529,000
Carrying value of senior notes	110,189,000		110,189,000		$ 114,940,000
Assets	429,123,000		429,123,000		430,203,000
Liabilities	233,894,000		$ 233,894,000		229,821,000
Minimum [Member]
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Useful lives of internal use software and capitalized cloud computing implementation costs			3 years
Useful lives of major information systems installations estimated period of use			5 years
Maximum [Member]
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Useful lives of internal use software and capitalized cloud computing implementation costs			5 years
Foreign Currency Forward Contracts [Member]
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Foreign currency forward contracts outstanding	0		$ 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		0
Liabilities	0		0
Level 2 [Member] | Nonrecurring [Member]
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Assets	0		0
Senior Notes [Member] | Level 2 [Member]
Basis of Presentation and Summary of Significant Accounting Policies [Line Items]
Fair value of senior notes	59,800,000		59,800,000
Carrying value of senior notes	$ 68,400,000		$ 68,400,000