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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
Income Tax [Line Items]
Operating loss carryforwards	$ 3,900	$ 4,800
Net deferred tax asset	300	200
Tax credit carryforwards	3,374	2,827
Interest and penalties included in income tax expense	500	400
Unrecognized tax benefits	9,352	9,384	$ 1,038
Unrecognized tax benefits that would impact the effective tax rate	9,200	$ 9,200
Unrecognized tax benefits affected by the resolution of tax examinations or expiring statutes of limitation	$ 400
Provision for income taxes	19.60%	30.80%
Accrued interest and penalties related to uncertain tax positions	$ 1,000	$ 500
Foreign Tax Authority [Member]
Income Tax [Line Items]
Tax credit carryforwards	$ 3,200	$ 2,600

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