Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Tables)

v3.7.0.1
Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of option activity
A summary of option activity for the three months ended March 31, 2017 is as follows:
 
 
Options Outstanding
 
 
Number of
shares
 
Weighted‑average
exercise price
 
Fair value of
options
granted
 
Weighted average
remaining
contractual term
(in years)
Balance, December 31, 2016
 
1,849,359

 
$
5.57

 
    
 
 
Granted
 
219,019

 
$
0.81

 
$
134,838

 
 
     Forfeited
 
(12,142
)
 
$
5.44

 
 
 
 
Balance, March 31, 2017
 
2,056,236

 
$
5.06

 
 
 
8.32
Exercisable at March 31, 2017
 
1,102,091

 
$
6.12

 
 
 
7.69
Schedule of stock-based compensation expense
Stock‑based compensation expense recognized for the three months ended March 31, 2017 and 2016 was as follows:
 
 
Three Months Ended
 
 
 
March 31,
 
 
 
2017
 
2016
 
Research and development
 
$
48,852

 
$
23,442

 
General and administrative
 
283,367

 
913,866

 
Total stock-based compensation
 
$
332,219

 
$
937,308