Note 4 - Diluted Net Income Per Share (Details) - Diluted Net Income Per Share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Aug. 31, 2014	Aug. 25, 2013
Diluted Net Income Per Share [Abstract]
Net income applicable to Common Stockholders (in Dollars)	$ 2,353	$ 4,752
Weighted average shares for basic net income per share	26,840	26,452
Stock options and restricted stock units	427	629
Weighted average shares for diluted net income per share	27,267	27,081
Diluted net income per share (in Dollars per share)	$ 0.09	$ 0.18

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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- Definition

This element represents the weighted average total number of shares issued throughout the period including the first (beginning balance outstanding) and last (ending balance outstanding) day of the period before considering any reductions (for instance, shares held in treasury) to arrive at the weighted average number of shares outstanding. Weighted average relates to the portion of time within a reporting period that common shares have been issued and outstanding to the total time in that period. Such concept is used in determining the weighted average number of shares outstanding for purposes of calculating earnings per share (basic).

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