Nature Of Operations And Summary Of Significant Accounting Policies (Property And Equipment) (Details) - USD ($) $ in Thousands	Aug. 31, 2018	Aug. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 68,411	$ 64,441
Less accumulated depreciation	(47,010)	(44,711)
Property and equipment	21,401	19,730
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	30,044
Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,723	2,119
Computer Hardware And Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	27,066	22,647
Furniture, Fixtures, And Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 8,272	$ 8,319

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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