Property, Plant and Equipment (Property, Plant and Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2015	Aug. 30, 2014
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 155,580	$ 151,566
Less accumulated depreciation	(127,210)	(126,431)
Total property, plant and equipment, net	28,370	25,135
Land [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	738	738
Buildings and building improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	48,092	47,273
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	92,351	90,101
Software [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	5,052	4,356
Transportation [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 9,347	$ 9,098