Warrant Liabilities (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Derivative [Line Items]
Gain (loss) on warrant liabilities	$ 14,702,904	$ (2,095,220)
Warrant [Member]
Derivative [Line Items]
Risk-free interest rate (in hundredths)	0.63%	0.45%
Expected dividend yield (in hundredths)	0.00%	0.00%
Expected lives	2 years 2 months 16 days	3 years 2 months 16 days
Expected volatility (in hundredths)	85.70%	69.00%
Warrants classified as liabilities (in shares)	6,984,716	6,984,716
Gain (loss) on warrant liabilities	$ 14,702,904	$ (2,095,220)