Stock-Based Compensation
 9 Months Ended
Sep. 30, 2019
Stock-Based Compensation  
Stock-Based Compensation

10. Stock-Based Compensation

Service-Based Stock Options

During the nine months ended September 30, 2019, the Company granted options with service-based vesting conditions for the purchase of 2,519,604 shares of common stock with a weighted average exercise price of $13.65 per share and a weighted average grant-date fair value of $9.25 per share.

Stock-Based Compensation

The Company recorded stock-based compensation expense in the following expense categories of its condensed consolidated statements of operations and comprehensive loss (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended September 30, 

 

Nine Months Ended September 30, 

 

    

2019

    

2018

    

2019

    

2018

Research and development expenses

 

$

2,195

 

$

1,347

 

$

6,798

 

$

2,331

General and administrative expenses

 

 

8,163

 

 

8,540

 

 

23,642

 

 

16,071

 

 

$

10,358

 

$

9,887

 

$

30,440

 

$

18,402

 

As of September 30, 2019, total unrecognized compensation cost related to the unvested stock-based awards was $76.9 million, which is expected to be recognized over a weighted average period of 2.3 years.