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Note 4 - Diluted Net Income Per Share (Tables)
6 Months Ended
Nov. 27, 2016
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
   
Six Months Ended
 
   
November 27,
2016
   
November 29,
2015
   
November 27,
2016
   
November 29,
2015
 
Numerator:
                               
Net income applicable to Common Stockholders
  $
1,326
    $
1,868
    $
4,638
    $
4,820
 
                                 
Denominator:
                               
Weighted average shares for basic net income per share
   
27,249
     
27,021
     
27,234
     
27,013
 
Effect of dilutive securities:
                               
Stock options and restricted stock units
   
369
     
399
     
338
     
404
 
Weighted average shares for diluted net income per share
   
27,618
     
27,420
     
27,572
     
27,417
 
                                 
Diluted net income per share
  $
0.05
    $
0.07
    $
0.17
    $
0.18