Quarterly report pursuant to Section 13 or 15(d)


9 Months Ended
Sep. 30, 2018
Stock-based Compensation  
Summary of restricted stock unit activity

A summary of restricted stock unit activity for the nine months ended September 30, 2018 is as follows (each restricted stock unit represents the right to receive one share of the Company's common stock):


    Number of Shares     Weighted-Average Grant Date Fair Value  
Balance of restricted stock units outstanding at December 31, 2017     820,000       2.28  
Grants of restricted stock units     45,000       2.60  
Vested restricted stock units     (478,750 )     2.49  
Balance of unvested restricted stock units at September 30, 2018     386,250     $ 2.06  

Summary of information of stock options outstanding and exercisable

The following table presents information relating to all stock options outstanding and exercisable at September 30, 2018:


        Weighted   Average    
Range of       Average   Remaining    
Exercise   Options   Exercise   Life in   Options
Price   Outstanding   Price   Years   Exercisable
$0.83 - $2.34   1,635,000   $1.18   1.74   1,635,000