Stockholders' Equity (Details 5) (Warrant [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Warrant [Member]
Stockholders Equity [Line Items]
Outstanding Number of Warrants at January 1, 2013	19,840,176
Granted Number of Warrants	7,761,211
Exercised Number of Warrants	(5,302,935)
Forfeited Number of Warrants	(2,711,633)
Outstanding Number of Warrants at December 31, 2013	19,586,819	19,840,176
Exercisable Number of Warrants	17,992,219
Outstanding Weighted-Average Exercise Price, at January 1, 2013	$ 2.08
Granted Weighted-Average Exercise Price	$ 1.83
Exercised Weighted-Average Exercise Price	$ 1.30
Forfeited Weighted Average Exercise Price	$ 3.10
Outstanding Weighted-Average Exercise Price, at December 31, 2013	$ 1.96	$ 2.08
Exercisable Weighted-Average Exercise Price, at December 31, 2013	$ 1.80
Outstanding Weighted-Average Remaining Contractual Life (in years)	3 years 4 months 24 days	3 years 6 months
Granted Weighted-Average Remaining Contractual Life (in years)	4 years
Exercisable Weighted-Average Remaining Contractual Life (in years), at December 31, 2013	3 years
Outstanding Aggregate Intrinsic Value, at January 1, 2013	$ 854,649
Outstanding Aggregate Intrinsic Value, at December 31, 2013	21,146,495	854,649
Exercisable Aggregate Intrinsic Value, at December 31, 2013	$ 19,695,409