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Derivative Warrant Liability (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Derivative Warrant Liability (Textual)        
Number of common stock, shares purchasable by warrants outstanding 840,454   840,454  
Change in fair value of derivative liability $ 180,000 $ 134,500 $ 290,800 $ 330,300