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Note 5 - Diluted Net Income Per Share (Tables)
6 Months Ended
Nov. 25, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
   
Six Months Ended
 
   
November 25, 2018
   
November 26, 2017
   
November 25, 2018
   
November 26, 2017
 
Numerator:
                               
Net (loss) income applicable to Common Stockholders
  $
(584
)   $
487
    $
(395
)   $
2,633
 
Denominator:
                               
Weighted average shares for basic net income per share
   
27,764
     
27,518
     
27,751
     
27,512
 
Effect of dilutive securities:
                               
Stock options and restricted stock units
   
     
357
     
     
354
 
Weighted average shares for diluted net income per share
   
27,764
     
27,875
     
27,751
     
27,866
 
                                 
Diluted net (loss) income per share
  $
(0.02
)   $
0.02
    $
(0.01
)   $
0.10