Nature Of Operations And Summary Of Significant Accounting Policies (Property And Equipment) (Details) - USD ($) $ in Thousands	Aug. 31, 2020	Aug. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 71,070	$ 69,586
Less accumulated depreciation	(55,347)	(51,007)
Property and equipment	15,723	18,579
Land And Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,312	1,312
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	30,038	30,038
Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	900	1,162
Computer Hardware And Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	29,691	28,665
Furniture, Fixtures, And Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 9,129	$ 8,409

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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