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Quarterly Results of Operations (Tables) | 12 Months Ended
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Dec. 31, 2018
Quarterly Results of Operations (Unaudited) [Abstract] |
Schedule of Quarterly Financial Information [Table Text Block] | QUARTERLY RESULTS OF OPERATIONS (Unaudited) (in millions, except per share data)
| 2018
| 1st Qtr. |  | 2nd Qtr. |  | 3rd Qtr. |  | 4th Qtr. |  | Year
Revenue | $ | 35.7 |  |  | $ | 39.4 |  |  | $ | 34.1 |  |  | $ | 83.8 |  |  | $ | 193.0 |
Cost of sales | 41.3 |  |  | 49.8 |  |  | 26.3 |  |  | 93.5 |  |  | 210.9 |
Gross profit (loss) | (5.6 | ) |  | (10.4 | ) |  | 7.8 |  |  | (9.7 | ) |  | (17.9 | )
Advanced technology license and decommissioning costs | 7.7 |  |  | 5.7 |  |  | 5.8 |  |  | 6.9 |  |  | 26.1 |
Selling, general and administrative | 11.2 |  |  | 9.7 |  |  | 8.8 |  |  | 10.2 |  |  | 39.9 |
Amortization of intangible assets | 1.3 |  |  | 1.5 |  |  | 1.7 |  |  | 2.1 |  |  | 6.6 |
Special charges for workforce reductions and advisory costs | 0.6 |  |  | 0.3 |  |  | 0.6 |  |  | 0.7 |  |  | 2.2 |
Gains on sales of assets | (0.1 | ) |  | (0.2 | ) |  | — |  |  | — |  |  | (0.3 | )
Operating loss | (26.3 | ) |  | (27.4 | ) |  | (9.1 | ) |  | (29.6 | ) |  | (92.4 | )
Gain on early extinguishment of debt | — |  |  | — |  |  | — |  |  | (0.5 | ) |  | (0.5 | )
Nonoperating components of net periodic benefit expense (income) | (1.6 | ) |  | (1.7 | ) |  | (1.6 | ) |  | 15.5 |  |  | 10.6 |
Interest expense | 1.0 |  |  | 1.0 |  |  | 1.0 |  |  | 1.1 |  |  | 4.1 |
Investment income | (0.6 | ) |  | (0.6 | ) |  | (0.7 | ) |  | (0.6 | ) |  | (2.5 | )
Income tax benefit | (0.1 | ) |  | — |  |  | — |  |  | 0.1 |  |  | — |
Net loss | $ | (25.0 | ) |  | $ | (26.1 | ) |  | $ | (7.8 | ) |  | $ | (45.2 | ) |  | $ | (104.1 | )
Preferred stock dividends - undeclared and cumulative | 1.9 |  |  | 2.0 |  |  | 1.9 |  |  | 2.0 |  |  | 7.8 |
Net loss allocable to common stockholders | $ | (26.9 | ) |  | $ | (28.1 | ) |  | $ | (9.7 | ) |  | $ | (47.2 | ) |  | $ | (111.9 | )
Net loss per share - basic and diluted | $ | (2.97 | ) |  | $ | (3.08 | ) |  | $ | (1.06 | ) |  | $ | (5.10 | ) |  | $ | (12.23 | )
| 2017
| 1st Qtr. |  | 2nd Qtr. |  | 3rd Qtr. |  | 4th Qtr. |  | Year
Revenue | $ | 7.2 |  |  | $ | 44.0 |  |  | $ | 50.3 |  |  | $ | 116.9 |  |  | $ | 218.4 |
Cost of sales | 10.1 |  |  | 48.7 |  |  | 39.0 |  |  | 90.4 |  |  | 188.2 |
Gross profit (loss) | (2.9 | ) |  | (4.7 | ) |  | 11.3 |  |  | 26.5 |  |  | 30.2 |
Advanced technology license and decommissioning costs | 6.1 |  |  | 4.4 |  |  | 4.5 |  |  | 0.7 |  |  | 15.7 |
Selling, general and administrative | 12.4 |  |  | 9.7 |  |  | 11.0 |  |  | 10.6 |  |  | 43.7 |
Amortization of intangible assets | 1.2 |  |  | 2.0 |  |  | 2.5 |  |  | 4.9 |  |  | 10.6 |
Special charges for workforce reductions and advisory costs | 2.4 |  |  | 2.3 |  |  | 2.4 |  |  | 2.4 |  |  | 9.5 |
Gains on sales of assets | (1.0 | ) |  | (0.7 | ) |  | (0.6 | ) |  | (2.3 | ) |  | (4.6 | )
Operating income (loss) | (24.0 | ) |  | (22.4 | ) |  | (8.5 | ) |  | 10.2 |  |  | (44.7 | )
Gain on early extinguishment of debt | (33.6 | ) |  | — |  |  | — |  |  | — |  |  | (33.6 | )
Nonoperating components of net periodic benefit expense (income) | (0.4 | ) |  | (0.4 | ) |  | (0.3 | ) |  | (26.1 | ) |  | (27.2 | )
Interest expense | 2.9 |  |  | 0.7 |  |  | 0.7 |  |  | 1.0 |  |  | 5.3 |
Investment income | (0.3 | ) |  | (0.3 | ) |  | (0.4 | ) |  | (0.3 | ) |  | (1.3 | )
Income tax (benefit) expense | (0.2 | ) |  | — |  |  | — |  |  | 0.1 |  |  | (0.1 | )
Net income (loss) | $ | 7.6 |  |  | $ | (22.4 | ) |  | $ | (8.5 | ) |  | $ | 35.5 |  |  | $ | 12.2 |
Preferred stock dividends - undeclared and cumulative | 1.0 |  |  | 2.0 |  |  | 2.0 |  |  | 1.9 |  |  | 6.9 |
Net income (loss) allocable to common stockholders | $ | 6.6 |  |  | $ | (24.4 | ) |  | $ | (10.5 | ) |  | $ | 33.6 |  |  | $ | 5.3 |
Net income (loss) per share: |  |  |  |  |  |  |  |  |
Basic | $ | 0.73 |  |  | $ | (2.69 | ) |  | $ | (1.15 | ) |  | $ | 3.69 |  |  | $ | 0.58 |
Diluted | $ | 0.72 |  |  | $ | (2.69 | ) |  | $ | (1.15 | ) |  | $ | 3.69 |  |  | $ | 0.58 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109225645&loc=d3e1280-108306 + Details
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