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6. Stock Options and warrants (Tables)
9 Months Ended
Sep. 30, 2012
Notes to Financial Statements  
Stock option activity

Stock option activity for the period January 1, 2012 to September 30, 2012, was as follows:

Options   Shares     Weighted-
Average
Exercise
Price
    Weighted-
Average
Remaining
Contractual
Term
    Aggregate
Intrinsic
Value
 
Outstanding at January 1, 2012     24,067,892     $ 0.30                  
Granted     4,850,000       0.26                  
Exercised     (58,334 )     0.27                  
Forfeited or expired                            
Outstanding at September 30, 2012     28,859,558     $ 0.30       8.1     $ 13,980,449  
Vested and exercisable at September 30, 2012     11,279,558     $ 0.37       7.3     $ 4,838,849  

    Outstanding Options   Exercisable Options
Option
Exercise Price Per Share
  Shares   Life
(Years)
  Weighted
Average
Exercise
Price
  Shares   Weighted
Average Exercise
Price
  $ 0.21 - $ 0.99       28,532,012       8.1     $ .28       10,952,012     $ 0.34  
  $ 1.00 - $ 1.99       327,546       2.6       1.25       327,546       1.25  
          28,859,558       8.1     $ 0.30       11,279,558     $ 0.37  

 

Black-Scholes-Merton pricing model with the following average assumptions

 

During the nine months ended September 30, 2012 and 2011, the Company valued options at the grant date using the Black-Scholes-Merton pricing model with the following average assumptions:

 

    September 30,  
    2012   2011  
           
Expected life (years)   5.0 – 7.0   6  
Risk free interest rate   .75% - 1.27%   1.95%  
Volatility     125%-132%   135.00%  
Expected dividend yield   0.00%      

Stock purchase warrants

The following table summarizes certain information about the Company’s stock purchase warrants from January 1, 2012 to September 30, 2012:

 

Warrants  Shares   Weighted-
Average
Exercise
Price
   Weighted-
Average
Remaining
Contractual
Term
   Aggregate
Intrinsic
Value
 
Outstanding at January 1, 2012   49,106,280   $0.28           
Granted   9,255,716    0.31           
Exercised   (6,347,393)   0.35           
Forfeited or expired   (4,062,910)   0.49           
Outstanding at September 30, 2012   47,951,693   $0.31    1.5   $22,351,154 
Vested and exercisable at September 30, 2012   46,585,026   $0.31    1.1   $21,708,821 

 

    Outstanding Warrants   Exercisable Warrants
Warrant
Exercise Price Per Share
  Shares   Life
(Years)
  Weighted
Average
Exercise
Price
  Shares   Weighted
Average Exercise
Price
  $ 0.25 - $ 0.99       47,451,693       1.5     $ .30       46,085,026     $ .30  
  $ 1.00 - $ 1.99       500,000       1.8       1.00       500,000       1.00  
          47,951,693       1.5     $ 0.31       46,585,026     $ 0.31