Warrant Liabilities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative [Line Items]
Gain (loss) on warrant liability	$ 2,435,865	$ (2,468,603)	$ 564,570	$ 12,234,301
Warrants [Member]
Derivative [Line Items]
Risk-free interest rate (in hundredths)			0.28%	0.44%
Expected dividend yield (in hundredths)			0.00%	0.00%
Expected lives			1 year 1 month 2 days	1 year 11 months 16 days
Expected volatility (in hundredths)			62.70%	84.10%
Warrants classified as liabilities (in shares)	6,371,854	6,984,716	6,371,854	6,984,716
Gain (loss) on warrant liability	$ 2,435,865	$ (2,468,603)	$ 564,570	$ 12,234,301