Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Warrants

v3.20.1
Fair Value of Warrants
3 Months Ended
Mar. 31, 2020
Fair Value Disclosures [Abstract]  
Fair Value of Warrants
Fair Value of Warrants

The following table summarizes the derivative warrant activity subject to fair value accounting for the three months ended March 31, 2020 (in thousands):
Issued with/for
Fair value of warrants
outstanding as of
December 31, 2019
 
Change in fair
value of warrants
 
Fair value of warrants
outstanding as of
March 31, 2020
2016 Offerings
$
178

 
$
(127
)
 
$
51



The derivative warrants issued as part of the 2016 Offerings are valued using a probability-weighted Binomial model. The following tables summarize the assumptions used in computing the fair value of derivative warrants subject to fair value accounting at March 31, 2020 and December 31, 2019.

2016 Offerings
As of March 31, 2020
 
As of December 31, 2019
Exercise price
$
67.50

 
$
67.50

Expected life (years)
1.83

 
2.08

Expected volatility
157.00
%
 
150.69
%
Risk-free interest rate
0.23
%
 
1.58
%
Expected dividend yield
%
 
%