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Note 5 - Diluted Net Income Per Share (Tables)
3 Months Ended
Aug. 26, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
 
   
August 26, 2018
   
August 27, 2017
 
Numerator:
               
Net income applicable to common stockholders
  $
190
    $
2,146
 
Denominator:
               
Weighted average shares for basic net income per share
   
27,738
     
27,506
 
Effect of dilutive securities:
               
Stock options and RSUs
   
282
     
352
 
Weighted average shares for diluted net income per share
   
28,020
     
27,858
 
Diluted net income per share
  $
0.01
    $
0.08