Annual report pursuant to Section 13 and 15(d)

Warrants (Tables)

v3.19.1
Warrants (Tables)
12 Months Ended
Dec. 31, 2018
Warrants and Rights Note Disclosure [Abstract]  
Summary of Warrant Activity

The following is a summary of activity in the number of warrants outstanding to purchase the Company’s common stock for the years ended December 31, 2018 and 2017 (in thousands):

 

    Warrants Accounted for as: Equity     Warrants Accounted for as:
Liabilities
       
    May 2018 Warrants     April 2013 Warrants     October 2013 Warrants     January 2014 Warrants     Total  
                               
Outstanding, December 31, 2017     -       50       26       133       209  
Exercised     -       -       -       -       -  
Granted     84       -       -       -       84  
Expired     -       (50 )     -       -       (50 )
Outstanding, December 31, 2018     84       -       26       133       243  
Expiration date     October 27, 2022       April 25, 2018       October 24, 2023       January 16, 2024          

Schedule of Fair Value of Warrants Classified as Liabilities

The fair value of the warrants classified as liabilities is estimated using the Black-Scholes option-pricing model with the following inputs as of December 31, 2018:

 

    October 2013
Warrants
    January 2014
Warrants
 
             
Strike price   $ 15.00     $ 15.00  
Expected dividend yield     0.00 %     0.00 %
Expected term (years)     4.8       5.0  
Cumulative volatility     89.64 %     89.76 %
Risk-free rate     2.59 %     2.60 %

 

The fair value of the warrants classified as liabilities is estimated using the Black-Scholes option-pricing model with the following inputs as of December 31, 2017:

 

    October 2013
Warrants
    January 2014
Warrants
 
             
Strike price   $ 15.00     $ 15.00  
Expected dividend yield     0.00 %     0.00 %
Expected term (years)     5.8       6.0  
Cumulative volatility     86.70 %     87.70 %
Risk-free rate     2.30 %     2.31 %