Quarterly report pursuant to Section 13 or 15(d)

Stock-based Activity (Tables)

v3.7.0.1
Stock-based Activity (Tables)
6 Months Ended
Jun. 30, 2017
Stock-based Activity Tables  
Valuation Assumptions
 

Three Months Ended

June 30,

 

Six Months Ended

June 30,

  2017   2016   2017   2016
Risk-free interest rate 1.8%   1.2 to 1.4%   1.5 to 2.0%   1.2 to 1.4%
Dividend yield 0%   0%   0%   0%
Expected volatility 80%   82 to 84%   73 to 85%   82 to 84%
Expected life of options, in years 5 yrs.   6 yrs.   1.4 to 6.0 yrs.   6 yrs.
Weighted-average grant date fair value $1.14   $2.76   $1.53   $2.93
Stock-based Compensation
    Three Months Ended     Three Months Ended     Six Months Ended     Six Months Ended  
    June 30,     June 30,     June 30,     June 30,  
    2017     2016     2017     2016  
Research and development   $ 376,684     $ 284,057     $ 697,359     $ 587,681  
General and administrative     2,093,140       673,506       2,805,277       1,903,770  
Total stock-based compensation expense   $ 2,469,824     $ 957,563     $ 3,502,636     $ 2,491,451  
Stock-based Award Activity
    Options Outstanding     Weighted-Average Exercise Price  
Outstanding at December 31, 2016     851,375     $ 10.94  
Granted     2,046,690       2.37  
Exercised            
Forfeited/cancelled/expired     (1,081 )     4.19  
Outstanding and expected to vest at June 30, 2017     2,896,984     $ 4.89  
Vested and exercisable at June 30, 2017     1,672,364     $ 4.73  
Restricted stock grants
    Shares     Weighted Average Grant-Date Fair Value  
Non-vested at December 31, 2016     205,478     $ 16.84  
Granted            
Vested     (98,238 )     17.02  
Forfeited            
Non-vested at June 30, 2017     107,240     $ 16.84  
Common stock reserved for future issuance
Common stock reserved for conversion of preferred stock and warrants     8,038,563  
Common stock options outstanding     2,896,984  
Authorized for future grant or issuance under the Stock Plan     972,129  
Unvested restricted stock     107,240  
Total     12,014,916