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Net Loss Per Share
 12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Net Loss Per Share
Net Loss Per Share
The following is a reconciliation of the numerator and denominator of the basic and diluted net loss per share (EPS) computations:
 
Year Ended December 31,
 
2015
 
2014
 
2013
 
(in millions, except share and per share amounts)
Numerator:
 
 
 
 
 
Net loss applicable to common shareholders
$
(38.8
)
 
$
(14.8
)
 
$
(24.6
)
Denominator:
 
 
 
 
 
Denominator for basic EPS—weighted-average common shares
59,925,776

 
52,189,580

 
44,773,560

Dilutive effect of stock-based compensation arrangements
—

 
—

 
—

Denominator for diluted EPS—adjusted weighted-average common shares
59,925,776

 
52,189,580

 
44,773,560

 
 
 
 
 
 
Basic EPS
$
(0.65
)
 
$
(0.28
)
 
$
(0.55
)
Diluted EPS
$
(0.65
)
 
$
(0.28
)
 
$
(0.55
)


The diluted EPS calculation for the year ended December 31, 2015 excludes the effect of the following outstanding stock-based awards as their effect is anti-dilutive: 6,296,789 stock options, 258,813 shares of restricted stock and 16,125 restricted stock units. The diluted EPS calculation for the years ended December 31, 2014 and 2013 excludes the effect of 5,262,913 and 4,767,874 outstanding stock options, respectively, as their effect is anti-dilutive. Holders of non-vested stock-based compensation awards do not have voting rights or rights to receive nonforfeitable dividends on the shares covered by the awards.