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Net Income (loss) Per Share (Tables)
 12 Months Ended
Dec. 31, 2013
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Net Loss per Share
The following table sets forth the computation of basic and diluted net loss per share:
 
Year Ended December 31,
 
2013
 
2012
 
2011
Net income (loss)
$
(4,111,853
)
 
$
(7,662,376
)
 
$
(10,193,986
)
Denominator for basic earnings per share - weighted average shares
96,285,504

 
81,646,295

 
72,450,337

Effect of dilutive securities: Stock options and warrants outstanding and convertible debt (a)
—

 
—

 
—

Denominator for diluted earnings per share - weighted average shares adjusted for dilutive securities
96,285,504

 
81,646,295

 
72,450,337

Income (loss) per common share - basic and diluted
$
(0.04
)
 
$
(0.09
)
 
$
(0.14
)
(a)
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:
Summary of Antidilutive Securities
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:
 
Year Ended December 31,
 
2013
 
2012
 
2011
Outstanding Stock Options
15,375,960

 
13,614,135

 
10,333,583

Outstanding Warrants
1,284,816

 
3,129,168

 
9,388,817

Convertible Debt, promissory notes
—

 
5,313,645

 
5,007,732

Convertible Line of Credit with Related Party
—

 
—

 
1,342,726

Convertible Debt, Acquisition
—

 
—

 
1,299,315

 
16,660,776

 
22,056,948

 
27,372,173