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Share-based Compensation (Tables)
12 Months Ended
Dec. 31, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

We estimated the fair value of each option award at the grant date by using the Black-Scholes option pricing model with the following range of assumptions for awards:

 

  For the Year Ended 
  December 31,  December 31, 
  2012  2011 
       
Dividend yield  0%  0%
Expected volatility, in years  125%  82% to 136%
Risk-free interest rates  0.8% to 0.9%  0.4% to 2.6%
Expected lives, in years  5   2 to 7 
Stock Option Activity

The following table summarizes our stock option activity for the periods presented:

 

     Weighted- 
  Number  Average 
  of Shares  Exercise 
  Issuable  Price 
       
Balance, January 1, 2011  3,488,761  $1.02 
Granted  2,597,500  $1.26 
Exercised  -     
Cancelled  (200,000) $1.40 
Balance, December 31, 2011  5,886,261  $1.11 
Granted  300,000  $0.72 
Exercised  -     
Cancelled  (476,136) $1.15 
Balance, December 31, 2012  5,710,125  $1.10 

 

Options Outstanding

The following table summarizes options outstanding at December 31, 2011:

 

     Weighted-  Weighted-    
  Number  Average  Average  Aggregate 
  of Shares  Exercise  Remaining  Intrinsic 
  Issuable  Price  Term (Years)  Value 
             
Exercisable  3,578,567  $1.04   3.0  $82,177 
Not vested  2,131,558  $1.22   3.3  $200,034 
Balance, December 31, 2012:  5,710,125  $1.10   3.2  $282,211 
Schedule of Stockholders' Equity Note, Warrants or Rights

The following table sets forth our warrant activity during the periods presented:

 

     Weighted- 
  Number  Average 
  of Shares  Exercise 
  Issuable  Price 
       
Balance, January 1, 2011  5,329,783  $1.16 
Granted  582,358  $0.90 
Exercised  (460,000) $0.60 
Cancelled        
Balance, December 31, 2011  5,452,141  $1.18 
Granted  22,048,510  $0.67 
Exercised  -     
Cancelled  (147,500) $2.25 
Balance, December 31, 2012  27,353,151  $0.76 

 

The following table sets forth the warrants granted during the year ended December 31, 2012:

 

     Weighted- 
  Number  Average 
  of Shares  Exercise 
  Issuable  Price 
       
10% convertible debenture - bonus warrants  166,675  $0.60 
10% convertible preferred stock - warrants  3,761,365  $1.00 
8% convertible promissory notes - warrants  17,820,470  $0.60 
Consultants  300,000  $0.82 
Total  22,048,510  $0.76