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Note 13 - Stockholders' Equity (Detail) - Consolidated Statements of Changes in Stockholders' Equity (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Feb. 24, 2013
Feb. 26, 2012
Feb. 24, 2013
Feb. 26, 2012
Common Stock Shares        
Balance, Common Stock Shares (in Shares)     25,644,580 [1]  
Stock options exercised, net of shares tendered (in Shares)     250,584  
Vested restricted stock units, net of shares tendered (in Shares)     11,248  
Balance, Common Stock Shares (in Shares) 25,906,412   25,906,412  
Common Stock        
Balance, Common Stock Value     $ 26 [1]  
Balance, Common Stock Value 26   26  
Additional Paid-in Capital        
Balance, Additional Paid-in Capital     119,894 [1]  
Stock options exercised, net of shares tendered     1,385  
Taxes paid by Company for RSUs vested     (49)  
Stock-based compensation expense     1,135  
Tax-benefit from stock based compensation expense     2,743  
Balance, Additional Paid-in Capital 125,108   125,108  
Retained Earnings        
Balance, Retained Earnings     29,822 [1]  
Net income 4,789 4,765 18,068 9,917
Balance, Retained Earnings 47,890   47,890  
Non controlling Interest        
Balance, Non Controlling Interest     1,816 [1]  
Non controlling interest in net income 3 49 159 288
Distributions to non controlling interest     (320) (257)
Balance, Non Controlling Interest $ 1,655   $ 1,655  
[1] Derived from audited financial statements.