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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019
Income Tax [Line Items]
Operating loss carryforwards	$ 4,500	$ 3,900
Net deferred tax asset	300	300
Tax credit carryforwards	3,911	3,374
Interest and penalties included in income tax expense	300	500
Unrecognized tax benefits	9,314	9,352	$ 9,384
Unrecognized tax benefits that would impact the effective tax rate	9,100	$ 9,200
Unrecognized tax benefits affected by the resolution of tax examinations or expiring statutes of limitation	$ 300
Provision for income taxes	18.80%	19.60%
Accrued interest and penalties related to uncertain tax positions	$ 1,200	$ 1,000
Foreign Tax Authority [Member]
Income Tax [Line Items]
Tax credit carryforwards	$ 3,700	$ 3,200

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