Net Income (loss) Per Share (Details) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Computation of basic and diluted net loss per share [Abstract]
Net income (loss)	$ (307,118)		$ (4,219,372)		$ (2,684,915)		$ (6,057,092)
Denominator for basic earnings per share - weighted average shares (in shares)	96,914,856		84,493,164		95,429,988		84,091,014
Effect of dilutive securities: Stock options and warrants outstanding and convertible debt (in shares)	0	[1]	0	[1]	0	[1]	0	[1]
Denominator for diluted earnings per share - weighted average shares adjusted for dilutive securities (in shares)	96,914,856		84,493,164		95,429,988		84,091,014
Income (loss) per common share - basic and diluted (in dollars per share)	$ 0.00		$ (0.05)		$ (0.03)		$ (0.07)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)					17,063,212		22,589,158
Outstanding Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)					15,139,543		12,642,833
Outstanding Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)					1,923,669		3,241,668
Convertible Debt, Promissory Notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)					0		5,313,133
Revolving Credit Facility [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)					0		1,391,524

[1] Securities outstanding that were excluded from the computation, prior to the use of the treasury stock method, because they would have been anti-dilutive are as follows: