Nature Of Operations And Summary Of Significant Accounting Policies (Property And Equipment) (Details) - USD ($) $ in Thousands	Aug. 31, 2016	Aug. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 63,636	$ 63,835
Less accumulated depreciation	(47,553)	(48,336)
Property and equipment	16,083	15,499
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	32,201	31,556
Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,279	2,273
Computer Hardware And Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	18,552	18,327
Furniture, Fixtures, And Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 9,292	$ 10,367