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Net Income (loss) Per Share (Tables)
 12 Months Ended
Dec. 31, 2015
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 income (loss) per share (in thousands except per share data):
 
Year Ended December 31,
 
2015
 
2014
 
2013
Net income (loss)
$
29,446

 
$
6,220


$
(4,112
)
Denominator for basic earnings per share - weighted average shares
105,929,205

 
105,793,008

 
96,285,504

Effect of dilutive securities: Stock options, warrants, and restricted stock (a)
7,699,277

 
7,502,496

 
—

Denominator for diluted earnings per share - weighted average shares adjusted for dilutive securities
113,628,482

 
113,295,504

 
96,285,504

Income (loss) per common share - basic
0.28

 
0.06

 
(0.04
)
Income (loss) per common share - diluted
$
0.26

 
$
0.05

 
$
(0.04
)
(a)Securities that are included in the computation of the denominator above, utilizing the treasury stock method for the years ended December 31, 2015 and 2014 are as follows:
Summary of antidilutive securities
Securities that are included in the computation of the denominator above, utilizing the treasury stock method for the years ended December 31, 2015 and 2014 are as follows:    
Effect of dilutive securities:
2015

2014

    Stock Options
7,121,774

7,035,728

    Warrants
33,676

226,926

    Restricted Stock Awards
543,827

239,842

 
7,699,277

7,502,496