XML 33 R21.htm IDEA: XBRL DOCUMENT v3.10.0.1
Equity (Tables)
 6 Months Ended
Jun. 30, 2018
Equity [Abstract]  
Summary of Stock Option Activity

A summary of stock option activity for the six months ended June 30, 2018 is as follows:

 

   

Number

of Options

(in shares)

    

Weighted

Average

Exercise

Price Per Share

     Weighted Average Remaining Contractual Life   Aggregate Intrinsic Value  
Outstanding at December 31, 2017     1,401,489     $ 3.45              
Granted     125,000       0.31              
Exercised     —                      
Forfeited or expired     (7,500 )   $ 0.14              
Outstanding at June 30, 2018     1,518,989     $ 3.21     2.7 years   $ 25  
Exercisable at June 30, 2018     1,433,155     $ 3.38     2.7 years   $ 22  
Schedule of Stock Options Fair Value Assumptions Estimated Using Black-Scholes Pricing Model

Risk-free interest rate     2.6 %
Expected term of options     6.6 years  
Expected annual volatility     85 %
Expected dividend yield     — %
Summary of Warrant Activity

A summary of warrant activity follows:

 

   

Number

of Warrants

(in shares)

     Weighted Average Exercise Price Per Share     Weighted Average Remaining Contractual Life
Outstanding at December 31, 2017     2,654,423     $ 1.46      
Granted     —       —      
Exercised     —       —      
Forfeited or expired     —       —      
Outstanding at June 30, 2018     2,654,423     $ 1.46     1.7 years