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Basis Of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
May 31, 2020 | May 31, 2019 | May 31, 2020 | May 31, 2019 | Sep. 01, 2019 | Aug. 31, 2019 | Nov. 30, 2018
Basis of Presentation and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Realized foreign currency transactions | $ 0 | $ 0 | $ 0 | $ 0 |  |  |
Unrealized foreign currency transactions |  |  | (30,000) | $ 658,000 |  |  |
Carrying value of senior notes | 94,566,000 |  | 94,566,000 |  |  | $ 60,221,000 |
Assets | 385,951,000 |  | 385,951,000 |  |  | 302,662,000 |
Liabilities | 240,968,000 |  | 240,968,000 |  |  | $ 157,187,000 |
Foreign Currency Forward Contracts [Member] |  |  |  |  |  |  |
Basis of Presentation and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Foreign currency forward contracts outstanding | 8,700,000 |  | $ 8,700,000 |  |  |  |
Foreign currency forward contracts, Maturity date |  |  | Jun. 29, 2020 |  |  |  |
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
Level 2 [Member] | Nonrecurring [Member] |  |  |  |  |  |  |
Basis of Presentation and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Assets | 0 |  | 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 | 20,800,000 |  | 20,800,000 |  |  |  |
Carrying value of senior notes | $ 18,000,000.0 |  | $ 18,000,000.0 |  |  |  |
Accounting Standards Update 2018-11 [Member] |  |  |  |  |  |  |
Basis of Presentation and Summary of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Assets |  |  |  |  | $ 9,000,000.0 |  |
Liabilities |  |  |  |  | $ 9,200,000 |  |

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