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Loss Per Share (Tables)
 9 Months Ended
Sep. 30, 2013
Earnings Per Share [Abstract]  
Calculation of Numerator and Denominator in Earnings Per Share
The following table represents the net loss and weighted average shares outstanding for the calculation of basic and diluted loss per share for the nine and three months ended September 30, 2013 and 2012:
 
Nine Months
 
Three Months
 
2013
 
2012
 
2013
 
2012
Numerator:
 
 
 
 
 
 
 
Basic and diluted loss per share – net loss
$
(11,301
)
 
$
(31,379
)
 
$
(1,877
)
 
$
(11,583
)
Deemed dividend related to the beneficial conversion feature
$
(11,894
)
 
$
—


$
(11,894
)

$
—

Income (loss) attributable to common stockholders
$
(23,195
)

$
(31,379
)

$
(13,771
)

$
(11,583
)
Denominator:
 
 
 
 
 
 
 

Basic and diluted weighted average shares outstanding
13,927,716

 
12,542,605

 
16,097,335

 
12,574,002