Income Taxes (Differences Between Income Taxes At The Statutory Federal Income Tax Rate And Income Taxes From Continuing Operations) (Details)	12 Months Ended
Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
Income Taxes [Abstract]
Federal statutory income tax rate	(21.00%)	(21.00%)	25.70%
State income taxes, net of federal effect	16.90%	(5.40%)	2.60%
Effect of change in U.S. federal tax rate			30.00%
Valuation allowance	(1412.90%)	(70.80%)	(50.40%)
Executive stock options	199.90%
Foreign jurisdictions tax differential	1.40%	(72.80%)	(6.80%)
Tax differential on income subject to both U.S. and foreign taxes	11.90%	(64.70%)	2.30%
Uncertain tax positions	13.80%	34.00%	(5.10%)
Non-deductible executive compensation	(18.20%)	(8.80%)	(2.70%)
Non-deductible meals and entertainment	(22.30%)	(52.90%)	(8.90%)
Payout of deferred compensation (NQDC)	6.10%	0.30%	4.40%
Other	(59.30%)	(10.70%)	2.20%
Income tax rate	(1283.70%)	(272.80%)	(6.70%)

Effective Income Tax Rate Reconciliation, Executive Stock Options, Percent

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Effective Income Tax Rate Reconciliation, Payout Of Deferred Compensation, Percent

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Effective income tax tate reconciliation, tax differential on income subject to both domestic and foreign taxes

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for share-based payment arrangement.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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