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Share-based Compensation (Tables)
9 Months Ended
Sep. 30, 2012
Share-based Compensation [Abstract]  
Non-cash, share-based compensation expense
                                         
    Three Months Ended
September 30,
    Nine Months Ended
September 30,
    Period from
December 17, 2001
(date of inception)

to September 30,
2012
 
    2012     2011     2012     2011    
                                         

Research and Development

  $ 25     $ 30     $ 76     $ 90     $ 572  

Selling, General and Administrative

    49       49       167       142       1,566  

Restructuring

    —         —         —         —         387  
   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 

Total

  $ 74     $ 79     $ 243     $ 232     $ 2,525  
   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 
Estimated fair values of employee stock options
                         
    Three Months Ended
September 30,
  Nine Months Ended
September 30,
 
    2012   2011   2012     2011  

Expected term

  *   *     5.3 years       5.8 years  

Expected volatility

  *   *     108%       110%  

Risk-free interest rate

  *   *     0.15%       2.20%  

Expected dividend yield

  *   *     0%       0%  

Weighted-average grant date fair value per share

  *   *   $ 0.78     $ 1.83  

*No options were granted during the three months ended September 30, 2011 and 2012.

Stock option transactions under all plans
                                 
    # of Options     Weighted
Average
Exercise
Price
    Weighted
Average
Remaining
Contractual
Term

(in years)
    Aggregate
Intrinsic
Value
 

Options outstanding at December 31, 2011

    864,238     $ 3.20       6.82     $ 23,894  

Changes during the period:

                               

Granted

    35,000       1.00                  

Exercised

    —         —                    

Forfeited, cancelled or expired

    (23,285     5.82                  
   

 

 

                         

Options outstanding at September 30, 2012

    875,953     $ 3.04       5.48     $ 318  
   

 

 

   

 

 

   

 

 

   

 

 

 

Options exercisable at September 30, 2012

    723,337     $ 3.14       4.99     $ 318  
                           

 

 

 

Options vested and expected to vest

    867,085     $ 3.04       5.47     $ 318