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14. Shareholders' Equity (Tables)
3 Months Ended
Mar. 31, 2013
Shareholders Equity Tables  
Stock Options- Assumptions

 

Estimated fair value of underlying common stock     $0.35 - $0.38  
Remaining life     5.0  
Risk-free interest rate     0.69% - 0.80%  
Expected volatility     80% - 89%  
Dividend yield    
Stock Options - Activity

The following table sets forth the activity of our stock options to purchase common stock:

 

   Options Outstanding   Options Exercisable
   Options Outstanding   Range of
Exercise
Prices
   Weighted Average Remaining Life in
Years
  Weighted
Average
Exercise
Price
   Options Exercisable   Weighted Average Remaining Life in
Years
  Weighted Average Exercise
Price
As of December 31, 2011  12,169,852    $0.14 - $1.50   3.2  $0.49   8,757,684   3.2  $0.40
Cancelled  (7,276,329)          (4,660,994)   
Exercised                 
Granted  3,050,000   $0.35 - $0.38   4.5  $0.36   1,634,333   4.5  $0.36
As of December 31, 2012  7,943,523    $0.35 -$0.54   3.3  $0.46   5,731,023   2.9  $0.48
Cancelled                 
Exercised                 
Granted                 
Vested             1,312,500    
As of March 31, 2013  7,943,523    $0.35 -$0.54   3.1  $0.46   7,043,523   3.0  $0.46

Warrants -Assumptions

 The following assumptions were used for the Black Scholes calculation to determine this expense:

 

Estimated fair value of underlying common stock     $0.38 - $0.75  
Remaining life     5.0  
Risk-free interest rate     0.74% - 1.80%  
Expected volatility     84% - 132%  
Dividend yield      
Calculations of the ratchet-down impact

Calculations of the ratchet-down impact as of April 4, 2012:

 

   Original  After Ratchet Down
   Shares  x  Strike  =  Aggregate
Exercise
Price
  Shares  x  Strike  =  Aggregate
Exercise
Price
                               
Series A warrants   21,750,000   $0.65   $14,137,500    47,125,000   $0.30   $14,137,500 
Series B warrants   10,875,000   $1.00   $10,875,000    36,250,000   $0.30   $10,875,000 
Placement agent warrant   3,600,000   $0.65   $2,340,000    7,800,000   $0.30   $2,340,000 
Broker-dealer warrant   1,000,000   $0.65   $650,000    2,166,667   $0.30   $650,000 
Advisory warrant   750,000   $0.65   $487,500    1,625,000   $0.30   $487,500 
    37,975,000              94,966,667           
                               
Additional warrants from ratchet-down    56,991,667           

 

Warrants - Summary

A summary of the warrants:

 

 

   Warrants Outstanding   Warrants Exercisable 
   Warrants Outstanding   Range of
Exercise
Prices
   Weighted Average Remaining Life in
Years
  Weighted Average Exercise Price   Warrants Exercisable    Weighted Average Remaining Life in Years  Weighted Average Exercise Price
As of December 31, 2011  59,530,245   $0.65 - $2.00   3.5  $2.00   59,530,245    3.5  $2.00
Exercised                  
Ratchet-down impact  56,991,667  $0.30     $0.30   56,991,667      $0.30
Granted  15,763,330   $0.30 - $0.75   4.6  $0.38   10,388,330    4.6 
As of December 31, 2012  132,285,242   $0.30 - $2.00   3.5  $0.40   126,910,242    3.5  $0.38
Cancelled                  
Exercised                  
Granted                  
Vested             2,530,000     
As of March 31, 2013  132,285,242   $0.30 - $2.00   3.3  $0.38   129,440,242    3.2  $0.38