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Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2017
Accounting Policies [Abstract]  
Computation Of Basic And Diluted Net Income (Loss) Per Share

The following table sets forth the computation of basic and diluted net income (loss) per share for the years ended December 31 (in thousands, except per share amounts):

 

     2017      2016      2015  

Numerator:

         

Net income (loss) attributable to Vicor Corporation

    $ 167    $ (6,247 )     $ 4,927
  

 

 

     

 

 

     

 

 

  

Denominator:

         

Denominator for basic net income (loss) per share-weighted average shares (1)

      39,228      38,842      38,754

Effect of dilutive securities:

         

Employee stock options (2)

      705         — 392
  

 

 

     

 

 

     

 

 

  

Denominator for diluted net income (loss) per share — adjusted weighted-average shares and assumed conversions (3)

      39,933      38,842      39,146
  

 

 

     

 

 

     

 

 

  

Basic net income (loss) per share

    $ 0.00      $ (0.16 )     $ 0.13
  

 

 

     

 

 

     

 

 

  

Diluted net income (loss) per share

    $ 0.00      $ (0.16 )     $ 0.13
  

 

 

     

 

 

     

 

 

  

 

(1) Denominator represents weighted average number of Common Shares and Class B Common Shares outstanding.

 

(2) Options to purchase 53,913, 1,696,222 and 238,792 shares of Common Stock in 2017, 2016, and 2015, respectively, were not included in the calculation of net income (loss) per share as the effect would have been antidilutive.

 

(3) Denominator represents weighted average number of Common Shares and Class B Common Shares outstanding for the year, adjusted to include the dilutive effect, if any, of outstanding options.