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Net Income Per Share
 9 Months Ended
Sep. 30, 2014
Earnings Per Share [Abstract]  
Net Income (Loss) Per Share
Net Income (Loss) Per Share
The Company computes basic net income (loss) per share using the weighted-average number of common shares outstanding during the period. Diluted net income (loss) per share assumes the conversion, exercise or issuance of all potential common stock equivalents, unless the effect of inclusion would be anti-dilutive. For purposes of this calculation, common stock equivalents include the Company's stock options, employee stock purchase plan ("ESPP"), restricted stock units, including those with performance conditions, warrants, and shares to be issued upon the conversion of the Senior Convertible Notes (see Note 6, Senior Convertible Notes).
The following table sets forth the computation of basic and diluted earnings or (loss) per share attributable to the Company :
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(in thousands, except per share data)
2014
 
2013
 
2014
 
2013
Numerator:
 
 
 
 
 
 
 
Net income (loss) attributable to the Company
$
(1,830
)
 
$
7,511

 
$
(24,194
)
 
$
1,893

Denominator for basic and diluted net income per share:
 
 
 
 
 
 
 
Weighted average common shares outstanding for basic
46,990

 
44,572

 
46,546

 
44,339

Dilutive potential common stock outstanding:
 
 
 
 
 
 
 
Stock options and ESPP shares
—

 
473

 
—

 
304

Restricted stock units
—

 
2,175

 
—

 
1,744

Weighted average common shares outstanding for diluted
46,990

 
47,220

 
46,546

 
46,387

Basic net income (loss) per share attributable to the Company
$
(0.04
)
 
$
0.17

 
$
(0.52
)
 
$
0.04

Diluted net income (loss) per share attributable to the Company
$
(0.04
)
 
$
0.16

 
$
(0.52
)
 
$
0.04


The following weighted outstanding common stock equivalents were not included in the calculation of diluted net income (loss) per share attributable to the Company because their effects were anti-dilutive:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(in thousands)
2014
 
2013
 
2014
 
2013
Stock options, ESPP shares and restricted stock units
8,777

 
4,957

 
8,999

 
5,759

Warrants
9,553

 
11,998

 
9,553

 
13,768

Senior Convertible Notes
9,553

 
9,553

 
9,553

 
10,003

Total
27,883

 
26,508

 
28,105

 
29,530