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Net Loss per Share (Details Textual)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Net Income (Loss) per Share (Textual) [Abstract]        
Diluted net income (loss) per share options and warrants 27,775,339 11,510,978 27,775,339 11,510,978