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Net Income per Share
 6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]  
Net Income per Share
11.
Net Income per Share
The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share amounts):
                                 
 
Three Months Ended
June 30,
   
Six Months Ended
June 30,
 
 
2019
    
2018
    
2019
    
2018
  
Numerator:
   
     
     
     
 
Net income attributable to Vicor Corporation
  $
2,563
     $
7,860
     $
6,849
     $
 11,803
  
                                 
Denominator:
   
     
     
     
 
Denominator for basic net income per share-weighted 
average shares (1)
    
40,275
      
39,709
      
40,252
      
39,594
  
Effect of dilutive securities:
   
     
     
     
 
Employee stock options (2)
   
806
      
937
      
803
      
812
  
                                 
Denominator for diluted net income per share – adjusted weighted-average shares and    assumed conversions
    
41,081
      
40,646
      
41,055
      
40,406
  
                                 
Basic net income per share
  $
0.06
     $
0.20
     $
0.17
     $
0.30
  
                                 
Diluted net income per share
  $
0.06
     $
0.19
     $
0.17
     $
0.29
  
                                 
 
 
 
 
 
 
 
 
 
 
 
(1) Denominator represents weighted average number of shares of Common Stock and Class B Common Stock outstanding.
 
 
 
 
 
 
 
 
 
 
(2) Options to purchase 142,817 and 128,018 shares of Common Stock for the three and six months ended June 30, 2019, respectively, and 44,793 and 79,857 shares of Common Stock for the three and six months ended June 30, 2018, respectively, were not included in the calculation of net income per share as the effect would have been antidilutive.