v3.19.2
Warrants (Tables)
6 Months Ended
Jun. 30, 2019
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 six months ended June 30, 2019 (in thousands):

 

  

Warrants

Accounted for as:
Equity

   Warrants
Accounted for as:
Liabilities
     
   May 2018
Warrants
  

October 2013

Warrants

  

January 2014

Warrants

   Total 
                 
Outstanding, December 31, 2018   84    26    133    243 
Exercised   -    -    -    - 
Granted   -    -    -    - 
Expired   -    -    -    - 
Outstanding, June 30, 2019   84    26    133    243 
Expiration date:   October 27, 2022   October 24, 2023    January 16, 2024      

 

The following is a summary of activity in the number of warrants outstanding to purchase the Company’s common stock for the six months ended June 30, 2018 (in thousands):

 

  

Warrants accounted for as:
Equity

  

Warrants accounted for as:
Liabilities

     
   May 2018
warrants
   April 2013
warrants
   October 2013
Series A
warrants
   January 2014
warrants
   Total 
                     
Outstanding, December 31, 2017   -    50    26    133    209 
                          
Warrants Issued   84    -    -    -    84 
Warrants Expired   -    (50)   -    -    (50)
Warrants exercised   -    -    -    -    - 
Outstanding, June 30, 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 June 30, 2019:

 

   October 2013
Warrants
   January 2014
Warrants
 
         
Strike price  $15.00   $15.00 
Expected dividend yield   0.00%   0.00%
Contractual term (years)   4.3    4.6 
Cumulative volatility   87.62%   89.39%
Risk-free rate   1.74%   1.75%

 

The fair value of the warrants classified as liabilities is estimated using the Black-Scholes option-pricing model with the following inputs as of June 30, 2018:

 

  

October 2013

warrants

  

January 2014

warrants

 
         
Strike price   $15.00   $15.00 
Expected dividend yield    0.00%   0.00%
Expected term (years)    5.32    5.55 
Cumulative volatility %    88.17%   88.59%
Risk-free rate %    2.74%   2.75%