Stockholders' Equity (Details 2) (Warrant, USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Minimum [Member]
Exercise price	$ 1.34	$ 7.08	$ 1.34	$ 7.08
Expected stock price volatility	77.70%	78.90%	77.70%	78.90%
Risk-free interest rate	0.95%	0.36%	0.95%	0.36%
Expected Term (years)	2 years 6 months	4 years 9 months 18 days	2 years 6 months	4 years 9 months 18 days
Maximum [Member]
Exercise price	$ 1.79	$ 7.08	$ 5.83	$ 7.08
Expected stock price volatility	79.00%	78.90%	90.60%	78.90%
Risk-free interest rate	1.76%	2.84%	1.76%	2.84%
Expected Term (years)	5 years 3 months 10 days	4 years 9 months 18 days	5 years 5 months	4 years 9 months 18 days