Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Tables)

v2.4.0.8
Stockholders' Equity (Tables)
6 Months Ended
Jun. 30, 2013
Financial Liabilities Subject to Fair Value Measurements

The following table sets forth the Company’s financial liabilities, related to warrants issued in the August 2008, October 2009 and March 2011 offerings, subject to fair value measurements as of June 30, 2013 and December 31, 2012:

 

(in thousands)    Fair Value as of
June 30,
2013
     Basis of Fair Value Measurements  
      Level 1      Level 2      Level 3  

August 2008 warrants

   $ 4,462       $ —         $ —         $ 4,462   

October 2009 warrants

     14,193         —           —           14,193   

March 2011 warrants

     15,328        —           —           15,328  
  

 

 

    

 

 

    

 

 

    

 

 

 

Total common stock warrants

   $ 33,983      $ —         $ —         $ 33,983   
  

 

 

    

 

 

    

 

 

    

 

 

 

 

(in thousands)    Fair Value as of
December 31,
2012
     Basis of Fair Value Measurements  
      Level 1      Level 2      Level 3  

August 2008 warrants

   $ 8,014       $ —         $ —         $ 8,014   

October 2009 warrants

     11,963         —           —           11,963   

March 2011 warrants

     12,581        —           —           12,581  
  

 

 

    

 

 

    

 

 

    

 

 

 

Total common stock warrants

   $ 32,558      $ —         $ —         $ 32,558   
  

 

 

    

 

 

    

 

 

    

 

 

 
Reconciliation of Warrant Liability Measured at Fair Value

The following table is a reconciliation of the warrant liability measured at fair value using level 3 inputs (in thousands):

 

     Warrant Liability  

Balance at December 31, 2012

   $ 32,558   

Change in fair value of common stock warrants during six months ended June 30, 2013

     8,938   

Exercise of warrants during six months ended June 30, 2013

     (7,513
  

 

 

 

Balance at June 30, 2013

   $ 33,983   
  

 

 

 
March 2011 offering [Member]
 
Outstanding Warrants Valuation Assumption
     June 30,
2013
    December 31,
2012
 

Risk-free interest rate

     0.66 %     0.72 %

Expected life (in years)

     2.71       3.21  

Dividend yield

     —          —     

Volatility

     95 %     94 %

Stock price

   $ 5.26     $ 4.21  
August 2008 offering [Member]
 
Outstanding Warrants Valuation Assumption
     June 30,
2013
    December 31,
2012
 

Risk-free interest rate

     0.10 %     0.16 %

Expected life (in years)

     0.16       0.66  

Dividend yield

     —          —     

Volatility

     62 %     118 %

Stock price

   $ 5.26     $ 4.21  
October 2009 offering [Member]
 
Outstanding Warrants Valuation Assumption
     June 30,
2013
    December 31,
2012
 

Risk-free interest rate

     0.36 %     0.25 %

Expected life (in years)

     1.27       1.76  

Dividend yield

     —          —     

Volatility

     63 %     98 %

Stock price

   $ 5.26     $ 4.21