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Stock-Based Compensation
3 Months Ended
Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock-Based Compensation

6. Stock-Based Compensation

The Company uses the Black-Scholes option pricing model to calculate the fair value of stock option awards and options granted under the Vicor Corporation 2017 Employee Stock Purchase Plan (“ESPP”) as of their grant date. Stock-based compensation expense, net for the three months ended March 31 was as follows (in thousands):

 

     2018      2017  

Cost of revenues

   $ 56    $ 34

Selling, general and administrative

     542      180

Research and development

     138      40
  

 

 

    

 

 

 

Total stock-based compensation

   $ 736    $ 254
  

 

 

    

 

 

 

Compensation expense by type of award for the three months ended March 31 was as follows (in thousands):

 

     2018      2017  

Stock options

   $ 593    $ 254

ESPP

     143      —    
  

 

 

    

 

 

 

Total stock-based compensation

   $ 736    $ 254