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Stock Options (Tables)
6 Months Ended
Jun. 30, 2013
Stock Options Tables  
Stock options outstanding and exercisable

The following table summarizes information about stock options outstanding and exercisable at June 30, 2013:

 

   

Number of Share

Options

   

Weighted Average

Exercise Price

   

Weighted Average

Remaining

Contractual Term in Years

   

Aggregate

Intrinsic Value(1)

 
Outstanding at December 31, 2012     810,000     $ 0.64       4.06     $  
Granted         $           $  
Exercised         $           $  
Forfeited or Cancelled         $           $  
Outstanding at June 30, 2013     810,000     $ 0.64       3.57     $            —  
Exercisable at June 30, 2013     625,000     $ 0.80       3.81     $            —  
Vested and expected to vest (2)     810,000     $ 0.64       3.57     $  
(1)   Aggregate intrinsic value represents the value of the closing price per share of our common stock on the last trading day of the fiscal period in excess of the exercise price multiplied by the number of options outstanding or exercisable, except for the “Exercised” line, which uses the closing price on the date exercised.
(2)   Number of shares includes options vested and those expected to vest net of estimated forfeitures.
                                     

 

Unvested share activity

 Unvested share activity for the six months ended June 30, 2013 is summarized below:

 

   

Unvested

Number of

Options

   

Weighted

Average

Grant Date Fair

Value

 
Unvested balance at December 31, 2012     236,000     $ 0.04  
Granted         $  
Vested     (50,000 )   $ 0.11  
Forfeited         $  
Unvested balance at June 30, 2013     186,000     $ 0.07  
Fair Value of Stock options

The fair values of all stock options granted during the six months ended June 30, 2013 and 2012 were estimated on the date of grant using the Black-Scholes option-pricing model with the following range of assumptions:

 

    For the six months ended  
   

June 30,

2013

   

June 30,

2012

 
    Expected life (in years)           6.5  
Average risk-free interest rate           1.66 %
Expected volatility           108 %
Expected dividend yield           0 %
Forfeiture rate           3 %