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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2013
Summary of Stock Option Activity

The following table is a summary of stock option activity from January 1, 2013 through June 30, 2013:

 

 

Stock Options

 

 

Number
of Shares

 

  

Exercise Price
Per Share

 

  

Weighted-
Average
Exercise Price
Per Share

 

Outstanding at December 31, 2012             

 

  3,530,085

  

  

$

0.11 - $0.62

  

  

$

  0.24

  

Granted             

 

  2,025,000

  

  

$

  0.05

  

  

 

  0.05

  

Canceled/forfeited             

 

(618,335

) 

  

$

0.05 - $0.62

  

  

 

  0.27

  

Outstanding at June 30, 2013             

 

  4,936,750

  

  

$

0.05 - $0.62

  

  

$

  0.16

  

 
Options Outstanding

The following information applies to options outstanding at June 30, 2013:

 

Range of Exercise Prices

 

Outstanding at
June 30,
2013

 

  

Weighted-

Average

Remaining

Contractual

Life

 

  

Weighted-

Average

Exercise

Price

 

  

Exercisable at

June 30,

2013

 

  

Weighted-

Average

Exercise

Price

 

$0.01 - 0.19             

 

  3,330,000

  

  

 

  6.3

  

  

$

  0.08

  

  

 

  261,945

  

  

$

  0.16

  

0.20 - 0.29             

 

  663,000

  

  

 

  3.9

  

  

$

  0.26

  

  

 

  580,776

  

  

$

  0.26

  

0.30 - 0.39             

 

  717,500

  

  

 

  3.9

  

  

$

  0.35

  

  

 

  593,750

  

  

$

  0.35

  

0.40 - 0.49             

 

  226,250

  

  

 

  1.5

  

  

$

  0.47

  

  

 

  226,250

  

  

$

  0.47

  

 

 

  4,936,750

  

  

 

  5.4

  

  

$

  0.16

  

  

 

  1,662,721

  

  

$

  0.30