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Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2013
Accounting Policies [Abstract]  
Computation of Basic and Diluted Income (Loss) Per Share

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

 

     2013     2012     2011  

Numerator:

  

    

Net income (loss) attributable to Vicor Corporation

    $ (23,640 )    $ (4,077 )    $ 8,843  
  

 

 

    

 

 

    

 

 

  

Denominator:

  

    

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

      39,195       41,811       41,797  

Effect of dilutive securities:

  

    

Employee stock options (2)

      —       —       59  
  

 

 

    

 

 

    

 

 

  

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

      39,195       41,811       41,856  
  

 

 

    

 

 

    

 

 

  

Basic income (loss) per share

    $ (0.60 )    $ (0.10 )    $ 0.21  
  

 

 

    

 

 

    

 

 

  

Diluted income (loss) per share

    $ (0.60 )    $ (0.10 )    $ 0.21  
  

 

 

    

 

 

    

 

 

  

 

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

 

(2) Options to purchase 1,989,248, 545,345, and 305,268 shares of Common Stock in 2013, 2012, and 2011, 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.