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Quarterly Results of Operations (Tables)
 12 Months Ended
Dec. 31, 2016
Quarterly Results of Operations (Unaudited) [Abstract]  
Schedule of Quarterly Financial Information [Table Text Block]
 
2016
 
1st Qtr.
 
2nd Qtr.
 
3rd Qtr.
 
4th Qtr.
 
Year
 
 
 
 
 
 
 
 
 
 
Revenue
$
90.0

 
$
63.4

 
$
21.4

 
$
136.5

 
$
311.3

Cost of sales
74.2

 
57.9

 
23.5

 
110.6

 
266.2

Gross profit (loss)
15.8

 
5.5

 
(2.1
)
 
25.9

 
45.1

Advanced technology license and decommissioning costs
12.0

 
4.7

 
21.9

 
9.3

 
47.9

Selling, general and administrative
11.4

 
12.5

 
10.7

 
11.6

 
46.2

Amortization of intangible assets
3.2

 
2.7

 
1.7

 
4.9

 
12.5

Special charges for workforce reductions and advisory costs
—

 
0.6

 
0.6

 
0.2

 
1.4

Gains on sales of assets
(0.3
)
 
(0.4
)
 
(0.3
)
 
(0.2
)
 
(1.2
)
Operating loss
(10.5
)
 
(14.6
)
 
(36.7
)
 
0.1

 
(61.7
)
Gain on early extinguishment of debt and debt restructuring costs
—

 
(16.7
)
 
—

 
3.7

 
(13.0
)
Interest expense
5.0

 
5.1

 
4.7

 
4.9

 
19.7

Investment income
(0.3
)
 
(0.1
)
 
(0.1
)
 
(0.3
)
 
(0.8
)
Provision (benefit) for income taxes
(0.6
)
 
—

 
—

 
—

 
(0.6
)
Net loss
$
(14.6
)
 
$
(2.9
)
 
$
(41.3
)
 
$
(8.2
)
 
$
(67.0
)
 
 
 
 
 
 
 
 
 
 
Net loss per share - basic and diluted
$
(1.60
)
 
$
(0.32
)
 
$
(4.54
)
 
$
(0.90
)
 
$
(7.36
)
 
2015
 
1st Qtr.
 
2nd Qtr.
 
3rd Qtr.
 
4th Qtr.
 
Year
 
 
 
 
 
 
 
 
 
 
Revenue
$
167.8

 
$
63.3

 
$
29.2

 
$
157.9

 
$
418.2

Cost of sales
160.9

 
59.0

 
53.6

 
75.8

 
349.3

Gross profit (loss)
6.9

 
4.3

 
(24.4
)
 
82.1

 
68.9

Advanced technology license and decommissioning costs
1.8

 
4.0

 
1.9

 
25.3

 
33.0

Selling, general and administrative
12.3

 
6.3

 
13.5

 
10.5

 
42.6

Amortization of intangible assets
4.0

 
2.0

 
1.1

 
6.3

 
13.4

Impairment of excess reorganization value
—

 
—

 
—

 
137.2

 
137.2

Special charges for workforce reductions
0.6

 
2.9

 
9.8

 
(0.1
)
 
13.2

Gains on sales of assets
(0.8
)
 
(0.7
)
 
(0.3
)
 
(0.3
)
 
(2.1
)
Operating loss
(11.0
)
 
(10.2
)
 
(50.4
)
 
(96.8
)
 
(168.4
)
Interest expense
4.9

 
4.9

 
4.8

 
5.0

 
19.6

Investment income
(0.2
)
 
—

 
(0.1
)
 
—

 
(0.3
)
Provision (benefit) for income taxes
(0.3
)
 
—

 
—

 
—

 
(0.3
)
Net loss
$
(15.4
)
 
$
(15.1
)
 
$
(55.1
)
 
$
(101.8
)
 
$
(187.4
)
 
 
 
 
 
 
 
 
 
 
Net loss per share - basic and diluted
$
(1.71
)
 
$
(1.68
)
 
$
(6.05
)
 
$
(11.19
)
 
$
(20.82
)