Quarterly report pursuant to Section 13 or 15(d)

Stock Options (Tables)

v3.10.0.1
Stock Options (Tables)
6 Months Ended
Jun. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Assumptions Used Principally in Determining Fair Value of Options Granted

The weighted average assumptions used principally in determining the fair value of options granted to employees were as follows:

 

    Six Months Ended June 30,  
    2018     2017  
Risk free interest rate     2.40 %     1.95 %
Expected dividend yield     0 %     0 %
Expected term in years     6.25       6.25  
Expected volatility     87.9 %     84.9 %

Summary of Option Activity

A summary of option activity for the six months ended June 30, 2018 and is presented below:

 

Options   Shares     Weighted
Average
Exercise
Price
   

Weighted
Average
Remaining

Contractual
Term in
Years

    Aggregate
Intrinsic
Value
 
Outstanding at December 31, 2017     7,844,966     $ 3.75                  
Granted     1,988,500       7.82                  
Exercised     (89,069 )     3.40                  
Forfeited     (275,406 )     7.78                  
Outstanding at June 30, 2018     9,468,991     $ 4.49       3.41     $ 18,702,009  
Vested at June 30, 2018     5,362,440     $ 2.58       2.07     $ 16,383,991