Components of the calculations of basic and diluted earnings per share (Tables)
 12 Months Ended
Dec. 31, 2013
Components of the calculations of basic and diluted earnings per share:  
Components of the calculations of basic and diluted earnings per share

The following table provides the components of the calculations of basic and diluted earnings per share:

 

 

 

Year Ended December 31,

 

 

2013

 

 

2012

 

2011

Numerator:

 

 

 

 

 

 

 

Net loss attributable to common shareholders

$

(62,790,800)

 

 

$

(31,862,454)

 

$

(27,453,954)

Denominator:

 

 

 

 

 

 

 

Weighted average number of common shares

 

 

 

 

 

 

 

outstanding

76,436,408 

 

 

34,376,427 

 

18,778,066 
Schedule of dilutive potential common shares

The dilutive potential common shares are summarized as follows:

 

 

At December 31,

 

2013

 

2012

 

2011

Stock options outstanding

 

4,703,326 

 

 

1,986,255 

 

1,948,997 

Restricted stock outstanding

 

650,002 

 

 

- 

 

280,771 

Common stock warrants (1)

 

24,137,878 

 

 

9,421,008 

 

7,128,563 

Preferred stock (2)

 

10,972,859 

 

 

- 

 

- 

Number of dilutive potential common shares

 

40,464,065 

 

 

11,407,263 

 

9,358,331