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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 |  |

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