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Note 4 - Diluted Net Income Per Share (Tables)
6 Months Ended
Nov. 29, 2015
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
November 29, 2015
   
Three Months Ended
November 30, 2014
   
Six Months Ended
November 29, 2015
   
Six Months Ended
November 30, 2014
 
Numerator:
                               
Net income applicable to Common Stockholders
  $ 1,868     $ 3,223     $ 4,820     $ 5,576  
                                 
Denominator:
                               
Weighted average shares for basic net income per share
    27,021       26,864       27,013       26,852  
Effect of dilutive securities:
                               
Stock options and restricted stock units
    399       450       404       441  
Weighted average shares for diluted net income per share
    27,420       27,314       27,417       27,293  
                                 
Diluted net income per share
  $ 0.07     $ 0.12     $ 0.18     $ 0.20