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Income Taxes (Narrative) (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2017
Income Tax [Line Items] |  |  |
Operating loss carryforwards | $ 4,800,000 | $ 3,000,000.0 |
Net deferred tax asset | 200,000 | 200,000 |
Tax credit carryforwards | 2,827,000 | 2,790,000 |
Reserved accrued | 8,700,000 |  |
Accrued interest | 400,000 |  |
Material interest or penalties included in income tax expense | 400,000 | 0 |
Unrecognized tax benefits | 9,384,000 | 1,038,000 | $ 981,000
Unrecognized tax benefits that would impact the effective tax rate | 9,200,000 | $ 900,000 |
Unrecognized tax benefits affected by the resolution of tax examinations or expiring statutes of limitation | $ 300,000 |  |
Federal income tax rate | 21.00% | 25.70% |
Remeasurement of deferred income taxes |  | $ (6,762,000) |
Provision for income taxes | 30.80% | 13.30% |
Accrued interest and penalties related to uncertain tax positions | $ 400,000 |  |
Foreign Tax Authority [Member] |  |  |
Income Tax [Line Items] |  |  |
Tax credit carryforwards | $ 2,600,000 | $ 2,500,000 |

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