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Note 7 - Diluted Net Income Per Share (Details) - Diluted Net Income Per Share (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Feb. 23, 2014
Feb. 24, 2013
Feb. 23, 2014
Feb. 24, 2013
Diluted Net Income Per Share [Abstract]        
Net income and comprehensive income applicable to common stockholders (in Dollars) $ 6,400 $ 4,789 $ 14,603 $ 18,068
Weighted average shares for basic net income per share 26,697 25,839 26,574 25,752
Stock options and restricted stock units 427 828 519 740
Weighted average shares for diluted net income per share 27,124 26,667 27,093 26,492
Diluted net income per share (in Dollars per share) $ 0.24 $ 0.18 $ 0.54 $ 0.68