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Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2013
Accounting Policies [Abstract]  
Derivative Instruments Measured at Fair Value

The following table represents our derivative instruments measured at fair value and the basis for that measurement:

 

     Level 1      Level 2     Level 3  

June 30, 2013

       

Warrant

   $ —         $ (7,649,962   $ —     

December 31, 2012

       

Warrant

     —           (4,969,752     —