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Stock-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock-Based Compensation
Stock-based compensation for continuing operations consisted of the following: Stock-based compensation for discontinued operations was immaterial.
 
 
Three Months Ended
 
 
March 31,
(In millions)
 
2016
 
2015
Stock-based compensation expense
 
$
0.2

 
$
0.9
Summary of Stock Option Activity
The following table summarizes our stock option activity:
 
 
Stock Options
 
Weighted Average Exercise Price
Outstanding December 31, 2015
 
4,551,221

 
$
9.02

Granted
 
20,000

 
0.83

Exercised
 
—

 
—

Canceled
 
(437,920
)
 
17.06

Forfeited
 
(264,207
)
 
1.46

Outstanding March 31, 2016
 
3,869,094

 
$
8.59

Exercisable as of March 31, 2016
 
2,867,618

 
$
11.06
Summary of Weighted Average Assumptions Used in the Valuation of Stock Options
The following table summarizes our weighted average assumptions used in the valuation of stock options:
 
Three Months Ended
 
March 31,
 
2016
 
2015
Volatility
41.0
%
 
46.0
%
Risk-free interest rate
1.8
%
 
1.9
%
Expected life (months)
72

 
73

Dividend yield
—

 
—
Summary of Restricted Stock Activity
The following table summarizes our restricted stock activity:
 
 
Restricted Stock
 
Weighted Average Grant Date Fair Value Per Share
Nonvested as of December 31, 2015
 
1,162,776

 
$
2.34

Granted
 
—

 
—

Vested
 
(155,596
)
 
2.62

Forfeited
 
(67,615
)
 
2.88

Nonvested as of March 31, 2016
 
939,565

 
$
2.26