Warrant Liabilities (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Warrant Liabilities [Abstract]
Loss (gain) on warrant derivative liabilities	$ (8,528,192)	$ 577,290	$ (12,416,358)	$ 1,177,762