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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
Aug. 26, 2012
Aug. 28, 2011
Aug. 28, 2011
Common Stock Shares      
Balance, (in Shares) 25,644,580    
Stock options exercised, net of shares tendered (in Shares) 54,156    
Vested restricted stock units, net of shares tendered (in Shares) 11,248    
Balance, (in Shares) 25,709,984    
Common Stock      
Balance, $ 26    
Balance, 26    
Additional Paid-in Capital      
Balance, 119,894    
Stock options exercised, net of shares tendered 202    
Taxes paid by Company for RSUs vested (49)    
Stock-based compensation expense 348    
Tax-benefit from stock based compensation expense 505    
Balance, 120,900    
Retained Earnings      
Balance, 29,822    
Net income 2,539 1,812 1,812
Balance, 32,361    
Non controlling Interest      
Balance, 1,816    
Non controlling interest in net income 97 141  
Balance, $ 1,913