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Earnings Per Share
 12 Months Ended
Dec. 31, 2014
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share
Basic earnings per share (“EPS”) excludes dilution and is computed by dividing net income (loss) attributable to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock using the treasury stock method. Potentially dilutive securities (consisting of warrants, options and restricted stock units (“RSUs”) and employee stock purchase plan (“ESPP”) withholdings calculated using the treasury stock method) are excluded from the diluted EPS computation in loss periods and when the applicable exercise price is greater than the market price on the period end date as their effect would be anti-dilutive.
Weighted average options, restricted stock units, warrants and ESPP shares to acquire a total of 8,130,000 shares, 4,424,000 shares and 5,793,000 shares of common stock for the years ended December 31, 2014, 2013 and 2012, respectively, were outstanding but not included in the computation of diluted earnings per share as their effect was anti-dilutive.
 
Year Ended December 31,
 
2014
 
2013
 
2012
 
(in thousands except per share amounts)
Numerator
 
 
 
 
 
Net loss attributable to common shareholders:
$
(39,674
)
 
$
(43,413
)
 
$
(89,266
)
Denominator
 

 
 

 
 

Weighted-average common shares outstanding
37,959

 
33,948

 
32,852

Basic and diluted net loss per share attributable to common shareholders
$
(1.05
)
 
$
(1.28
)
 
$
(2.72
)