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Stock-Based Compensation
 3 Months Ended
Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Stock-Based Compensation

Note 8—Stock-Based Compensation

Stock-Based Compensation Expense

Total stock-based compensation expense, by operating expense category, in the condensed consolidated statements of operations was as follows (in thousands):

 

     Three Months
Ended March 31,		  
     2017      2016  

Platform operations

    $ 229      $ 15  

Sales and marketing

      539        50  

Technology and development

      665        40  

General and administrative

      889        54  
  

 

 

     

 

 

  

Total

    $ 2,322      $ 159  
  

 

 

     

 

 

  

Stock Options

Stock option activity for the three months ended March 31, 2017 was as follows:

 

     Shares
Under Option
(in thousands)		      Weighted-
Average
Exercise Price		  

Outstanding at December 31, 2016(1)

      5,429      $ 4.94  

Granted

      44        29.60  

Exercised

      (680 )       0.40  

Cancelled

      (126 )       20.10  
  

 

 

     

Outstanding as of March 31, 2017(2)

      4,667      $ 5.43  
  

 

 

     

 

 

  

Exercisable as of March 31, 2017

      2,710      $ 1.13  
  

 

 

     

 

 

  

 

 

  (1)  Includes options to purchase 389 and 5,040 shares of Class A and Class B common stock, respectively.
  (2)  Includes options to purchase 393 and 4,274 shares of Class A and Class B common stock, respectively.

On January 1, 2017, the number of shares authorized for grant under the Company’s 2016 Incentive Award Plan was increased by 1.6 million shares in accordance with plan provisions.

Employee Stock Purchase Plan

On January 1, 2017, the number of shares available for issuance under the Company’s Employee Stock Purchase Plan was increased by 0.4 million shares in accordance with plan provisions.