Note 12 - Earnings Per Share (Details) - Components Of Basic And Diluted Net Income Per Share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Nov. 20, 2013	Nov. 21, 2012
Numerator:
Income (loss) from continuing operations (in Dollars)	$ (1,381)	$ 217
Loss from discontinued operations (in Dollars)	(85)	(88)
Net income (loss) (in Dollars)	$ (1,466)	$ 129
Denominator:
Denominator for basic earnings per share—weighted-average shares (in Shares)	28,765	28,386
Effect of potentially dilutive securities:
Employee and non-employee stock options (in Shares)		181
Denominator for earnings per share assuming dilution (in Shares)	28,765	28,567
Income (loss) per share from continuing operations:
Basic	$ (0.05)	$ 0.01
Assuming dilution	$ (0.05)	$ 0.01
Net income (loss) per share:
Basic	$ (0.05)	$ 0.01
Assuming dilution	$ (0.05)	$ 0.01