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Note 9 - Stockholders' Equity (Tables)
6 Months Ended
Nov. 29, 2015
Notes Tables  
Schedule of Stockholders Equity [Table Text Block]
   
November 29, 2015
 
Common Stock Shares
 
 
 
 
Balance at May 31, 2015
    26,990,490  
Stock options exercised, net of shares tendered
    34,532  
Vested restricted stock units, net of shares tendered
    8,114  
Balance at November 29, 2015
    27,033,136  
         
Common Stock
 
 
 
 
Balance at May 31, 2015
  $ 27  
Stock options exercised, net of shares tendered
     
Vested restricted stock units, net of shares tendered
     
Balance at November 29, 2015
  $ 27  
         
Additional Paid-in Capital
 
 
 
 
Balance at May 31, 2015
  $ 133,307  
Stock options exercised, net of shares tendered
    108  
Vested restricted stock units, net of shares tendered
     
Taxes paid by Company for stock swaps and RSUs
     
Stock-based compensation expense
    1,697  
Tax benefit from stock based compensation expense
    90  
Balance at November 29, 2015
  $ 135,202  
         
Retained Earnings
 
 
 
 
Balance at May 31, 2015
  $ 85,098  
Net income applicable to common stockholders
    4,820  
Balance at November 29, 2015
  $ 89,918  
         
Non
-
controlling Interest
 
 
 
 
Balance at May 31, 2015
  $ 1,677  
Non-controlling interest in net income
    96  
Distributions to non-controlling interest
    (248 )
Balance at November 29, 2015
  $ 1,525