Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Tables)

v2.4.0.6
Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2012
Fair Value Measurements [Abstract]  
Summary of assets and liabilities measured at fair value on recurring basis
                                 

December 31, 2012

  Level 1     Level 2     Level 3     Total  

Assets

                               

Cash

  $ 2,440     $ —       $ —       $ 2,440  

Money market securities

    15,949       —         —         15,949  

Corporate bonds and commercial paper

    —         57,308       —       $ 57,308  

Total assets

  $ 18,389     $ 57,308     $ —       $ 75,697  

Liabilities

                               

Warrants

  $ —       $ —       $ 3,422     $ 3,422  
         

December 31, 2011

  Level 1     Level 2     Level 3     Total  

Assets

                               

Cash

  $ 5,725     $ —       $ —       $ 5,725  

Money market securities

    21,163       —         —         21,163  

Corporate bonds and commercial paper

    —         38,416       —         38,416  

Total assets

  $ 26,888     $ 38,416     $ —       $ 65,304  

Liabilities

                               

Warrants

  $ —       $ —       $ 7,881     $ 7,881  
Summary of marketable securities
                                 

December 31, 2012

  Amortized
Cost
    Gross
Unrealized
Gains
    Gross
Unrealized
Losses
    Estimated
Fair Value
 

Cash

  $ 2,440     $ —       $ —       $ 2,440  

Money market securities

    15,635       —         —         15,635  

Corporate bonds and commercial paper

    —         —         —         —    

Total cash and cash equivalents

  $ 18,075     $ —       $ —       $ 18,075  

Money market securities

    314       —         —         314  

Total restricted cash

  $ 314     $ —       $ —       $ 314  

U.S. government securities

    —         —         —         —    

U.S. agency securities

    —         —         —         —    

Corporate bonds and commercial paper

    57,312       4       (8     57,308  

Total short-term investments

  $ 57,312     $ 4     $ (8   $ 57,308  

 

                                 

December 31, 2011

  Amortized
Cost
    Gross
Unrealized
Gains
    Gross
Unrealized
Losses
    Estimated
Fair Value
 

Cash

  $ 5,725     $     $     $ 5,725  

Money market securities

    20,786                   20,786  

Corporate bonds and commercial paper

    2,006                   2,006  

Total cash and cash equivalents

  $ 28,517     $     $     $ 28,517  

Money market securities

    377                   377  

Total restricted cash

  $ 377     $     $     $ 377  

Corporate bonds and commercial paper

    36,414       7       (11     36,410  

Total short-term investments

  $ 36,414     $ 7     $ (11   $ 36,410  
Summary of changes in fair value of Level 3 financial liabilities
                         
    Liability at
December 31, 2011
    Gain on
warrants
    Liability at
December 31, 2012
 

Warrant liability

  $ 7,881     $ 4,459     $ 3,422