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Warrants and Warrant Derivative Liability (Tables)
6 Months Ended
Jun. 30, 2013
Warrants to Purchase Common Shares Outstanding

The Company had 9,866,826 warrants to purchase common shares outstanding at June 30, 2013 at a weighted-average exercise price of $1.44, as summarized in the following table:

 

Issue Date    Amount    Exercise Price    Expiration Date
    4/27/07          17,500        $ 17.90          1/17/14  
    7/31/09          1,734,888          1.00          7/30/14  
    10/16/09          7,487,388          1.50          10/15/14  
    10/16/09          627,050          1.50          10/15/14  
      

 

 

      

 

 

      
         9,866,826        $ 1.44