Components of Basic And Diluted Net Income Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Nov. 21, 2012	Nov. 23, 2011
Numerator:
Income (loss) from continuing operations	$ 189	$ 583
Loss from discontinued operations	(60)	(379)
NET INCOME	$ 129	$ 204
Denominator:
Denominator for basic earnings per share-weighted-average shares	28,386	28,262
Effect of potentially dilutive securities:
Employee and non-employee stock options	181	42
Denominator for earnings per share assuming dilution	28,567	28,304
Income (loss) per share from continuing operations:
Basic	$ 0.01	$ 0.02
Assuming dilution	$ 0.01	$ 0.02
Loss per share from discontinued operations:
Basic		$ (0.01)
Assuming dilution		$ (0.01)
Net income (loss) per share:
Basic	$ 0.01	$ 0.01
Assuming dilution	$ 0.01	$ 0.01