Note 10 - Share-Based Compensation (Details) - Stock Option Activity (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended	12 Months Ended
May 06, 2015	Aug. 27, 2014
Stock Option Activity [Abstract]
Outstanding shares	1,313,246	800,754
Outstanding weighted average exercise price	$ 4.73	$ 4.95
Outstanding weighted average remaining contractual term	6 years 255 days	4 years 36 days
Outstanding aggregate intrinsic value	$ 881	$ 635
Exercisable at May 6, 2015	619,696
Exercisable at May 6, 2015	$ 4.88
Exercisable at May 6, 2015	3 years 328 days
Exercisable at May 6, 2015	411
Granted	628,060
Granted	$ 4.49
Exercised	(33,383)
Exercised	$ 3.46
Exercised	$ 54
Forfeited/Expired	(82,185)
Forfeited/Expired	$ 5.47

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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-Publisher FASB

-Name Accounting Standards Codification

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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