Warrant Liabilities (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Warrant Liabilities [Abstract]
Gain (loss) on warrant derivative liability	$ 6,436,342	$ 4,316,560	$ (5,980,016)	$ 5,494,322