Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements

v3.21.2
Fair Value Measurements
 6 Months Ended
Jun. 30, 2021
Fair Value Disclosures [Abstract]  
Fair Value Measurements
4. Fair Value Measurements
The following fair value hierarchy table presents information about the Company’s financial assets and liabilities measured at fair value on a recurring basis as of June 30, 2021 and December 31, 2020 (in thousands):
 
                                                                            
    
Fair Value Measurement as of June 30, 2021
  
    
Quoted Prices
in Active
Markets for
Identical Assets
(Level 1)
     
Significant
Other
Observable
Inputs
(Level 2)
     
Significant
Unobservable
Inputs
(Level 3)
  
Cash equivalents
   
$
18,048
 
   
$
—  
 
   
$
—  
 
Current marketable securities
   
 
46,093
 
   
 
—  
 
   
 
—  
 
Long-term marketable securities
   
 
7,161
 
   
 
—  
 
   
 
—  
 
Warrant liabilities
   
 
—  
 
   
 
—  
 
   
 
18,552
 
    
 
 
     
 
 
     
 
 
  
Total
   
$
71,302
 
   
$
—  
 
   
$
18,552
 
    
 
 
     
 
 
     
 
 
  
 
    
Fair Value Measurement as of December 31, 2020
  
    
Quoted Prices
in Active
Markets for
Identical Assets
(Level 1)
     
Significant
Other
Observable
Inputs
(Level 2)
     
Significant
Unobservable
Inputs
(Level 3)
  
Cash equivalents
    $ 12,921      $ —        $ —    
Marketable securities
      27,005                    
Warrant liabilities
      —          —          29,404  
    
 
 
     
 
 
     
 
 
  
Total
    $ 39,926      $ —        $ 29,404  
    
 
 
     
 
 
     
 
 
  
The Company issued warrants to the purchasers of its July 27, 2016 offering (the “2016 Warrants”). The Company determined that these warrants should be classified as a liability and considered as a Level 3 financial instrument (see also Note 8, “Capital Structure”). The 2016 Warrants are re-measured at each subsequent reporting period and changes in fair value are recognized in the consolidated statement of operations. 
The following assumptions were used in a Black-Scholes option-pricing model to determine the fair value of the warrant liability:
 
    
As of
June 30,
2021
    
As of
December 31,
2020
  
Expected volatility
      52.0 %      59.7 % 
Remaining contractual term (in years)
      0.08       0.58  
Risk-free interest rate
      0.05 %      0.09 % 
Expected dividend yield
      —    %      —    % 
The Company issued warrants to the purchasers of its July 25, 2017 offering (the “2017 Warrants”). The Company determined that these warrants should be classified as a liability and considered as a Level 3 financial instrument (see also Note 8, “Capital Structure”). The 2017 Warrants are
re-measured
at each subsequent reporting period and changes in fair value are recognized in the consolidated statement of operations. The following assumptions were used in a Black-Scholes option-pricing model to determine the fair value of the warrant liability:
 
    
As of
June 30,
2021
    
As of
December 31,
2020
  
Expected volatility
      67.7 %      100.1 % 
Remaining contractual term (in years)
      1.08       1.58  
Risk-free interest rate
      0.07 %      0.12 % 
Expected dividend yield
      —    %      —    % 
The Company issued warrants to the purchasers of its
 
May 27, 2020 
registered offering of securities
 (the “2020 Warrants”). The Company determined that these warrants should be classified as a liability and considered as a Level 3 financial instrument (see also Note 8, “Capital Structure”). The 2020 Warrants are
re-measured
at each subsequent reporting period and changes in fair value are recognized in the consolidated statement of operations. The following assumptions were used in a Black-Scholes option-pricing model to determine the fair value of the warrant liability:
 
    
As of
June 30,
2021
    
As of
December 31,
2020
  
Expected volatility
      97.5 %      111.9 % 
Remaining contractual term (in years)
      1.92       2.42  
Risk-free interest rate
      0.25 %      0.15 % 
Expected dividend yield
      —    %      —    % 
The following tables present a reconciliation of the Company’s financial liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and six months ended June 30, 2021 and 2020 (in thousands):
Warrant liabilities
 
    
Three Months Ended
June 30,
     
Six Months Ended
June 30,
  
    
2021
     
2020
     
2021
     
2020
  
Balance at beginning of period
    $ 23,838      $ 5,654      $ 29,404      $ 6,070  
Issuance of 2020 Warrants
      —          31,391        —          31,391  
(Decrease) increase in fair value (1)
      (5,286 )       7,305        (10,852 )       6,889  
    
 
 
     
 
 
     
 
 
     
 
 
  
Balance at end of period
    $ 18,552      $ 44,350      $ 18,552      $ 44,350  
    
 
 
     
 
 
     
 
 
     
 
 
  
 
(1)
The change in fair values of the warrant liabilities is recorded in other income (expense) in the consolidated statement of operations
.
The key inputs into the Black-Scholes option pricing model are the current
per-share
value and the expected volatility of the Company’s common stock. Significant changes in these inputs will directly increase or decrease the estimated fair value of the Company’s warrant liabilities.