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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2017
Share-based Compensation [Abstract]  
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]
A summary of stock-based compensation costs follows (in millions):
 
Year Ended December 31,
 
2017
 
2016
 
 
 
 
Total stock-based compensation costs:
 
 
 
Restricted stock units
$
0.1

 
$
0.2

Stock options
0.4

 
0.3

Expense included in selling, general and administrative expense
$
0.5

 
$
0.5

 
 
 
 
Total recognized tax benefit
$
—

 
$
—
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Assumptions used in the Black-Scholes option pricing model to value option grants follow. There were no option grants in the year ended December 31, 2017.
 
Year Ended December 31,
2016
 
 
Options granted (in thousands)
15
Risk-free interest rate
1.91%
Expected volatility
75%
Expected option life (years)
6
Weighted-average grant date fair value
$1.77
Share-based Compensation, Stock Options, Activity [Table Text Block]
Stock options vest and become exercisable in equal annual installments over a three or four year period and expire ten years from the date of grant. A summary of stock option activity follows:
 
 
Stock Options (thousands)
 
Weighted Average Exercise Price
 
Weighted Average Remaining Contractual Life in Years
 
Aggregate Intrinsic Value (millions)
 
 
 
 
 
 
 
 
 
Outstanding at December 31, 2016
 
483
 
$4.02
 
8.4
 
$1.1
Granted
 
—
 
—
 
 
 
 
Exercised
 
—
 
—
 
 
 
 
Forfeited/Cancelled
 
(58)
 
$3.12
 
 
 
 
Outstanding at December 31, 2017
 
425
 
$4.14
 
7.3
 
$0.1
Exercisable at December 31, 2017
 
236
 
$4.17
 
7.3
 
$0.1
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]
Stock options outstanding and options exercisable at December 31, 2017, follow:
Stock Exercise Price
 
Options Outstanding (thousands)
 
Weighted Average Remaining Contractual Life in Years
 
Options Exercisable (thousands)
 
 
 
 
 
 
 
$5.62
 
22
 
6.9
 
22
$4.37
 
300
 
7.2
 
150
$3.90
 
23
 
7.6
 
15
$3.93
 
15
 
7.6
 
10
$2.71
 
50
 
7.8
 
34
$2.68
 
15
 
8.5
 
5