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Quarterly Results of Operations | 12 Months Ended
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Dec. 31, 2020
Quarterly Results of Operations (Unaudited) [Abstract] |
Quarterly Financial Information [Text Block] | QUARTERLY RESULTS OF OPERATIONS (Unaudited) (in millions, except per share data)
| 2020
| 1st Qtr. |  | 2nd Qtr. |  | 3rd Qtr. |  | 4th Qtr. |  | Year
Revenue | $ | 45.0 |  |  | $ | 75.7 |  |  | $ | 33.6 |  |  | $ | 92.9 |  |  | $ | 247.2 |
Cost of sales | 25.4 |  |  | 31.9 |  |  | 34.4 |  |  | 57.9 |  |  | 149.6 |
Gross profit (loss) | 19.6 |  |  | 43.8 |  |  | (0.8) |  |  | 35.0 |  |  | 97.6 |
Advanced technology costs | 0.9 |  |  | 0.7 |  |  | 0.2 |  |  | 1.0 |  |  | 2.8 |
Selling, general and administrative | 8.5 |  |  | 10.4 |  |  | 6.7 |  |  | 10.4 |  |  | 36.0 |
Amortization of intangible assets | 1.4 |  |  | 1.7 |  |  | 1.2 |  |  | 2.5 |  |  | 6.8 |
Special charges (credits) for workforce reductions | (0.1) |  |  | — |  |  | 0.6 |  |  | 0.1 |  |  | 0.6 |
Other (income) expense, net | — |  |  | — |  |  | — |  |  | 0.4 |  |  | 0.4 |
Operating income (loss) | 8.9 |  |  | 31.0 |  |  | (9.5) |  |  | 20.6 |  |  | 51.0 |
Nonoperating components of net periodic benefit expense (income) | (2.2) |  |  | (2.2) |  |  | (2.2) |  |  | 5.0 |  |  | (1.6) |
Interest expense | 0.1 |  |  | — |  |  | — |  |  | — |  |  | 0.1 |
Investment income | (0.4) |  |  | — |  |  | (0.1) |  |  | — |  |  | (0.5) |
Income tax (benefit) expense | 0.1 |  |  | (0.5) |  |  | (0.2) |  |  | (0.8) |  |  | (1.4) |
Net income (loss) | $ | 11.3 |  |  | $ | 33.7 |  |  | $ | (7.0) |  |  | $ | 16.4 |  |  | $ | 54.4 |
Preferred stock dividends - undeclared and cumulative | 2.0 |  |  | 2.0 |  |  | 1.9 |  |  | 0.8 |  |  | 6.7 |
Distributed earnings allocable to retired preferred shares | — |  |  | — |  |  | — |  |  | 41.9 |  |  | 41.9 |
Net income (loss) allocable to common stockholders | $ | 9.3 |  |  | $ | 31.7 |  |  | $ | (8.9) |  |  | $ | (26.3) |  |  | $ | 5.8 |
Net income (loss) per share: |  |  |  |  |  |  |  |  |
Basic | $ | 0.97 |  |  | $ | 3.28 |  |  | $ | (0.83) |  |  | $ | (2.55) |  |  | $ | 0.59 |
Diluted | $ | 0.95 |  |  | $ | 3.19 |  |  | $ | (0.83) |  |  | $ | (2.55) |  |  | $ | 0.57 |
| 2019
| 1st Qtr. |  | 2nd Qtr. |  | 3rd Qtr. |  | 4th Qtr. |  | Year
Revenue | $ | 38.7 |  |  | $ | 10.6 |  |  | $ | 104.7 |  |  | $ | 55.7 |  |  | $ | 209.7 |
Cost of sales | 44.2 |  |  | 14.9 |  |  | 69.2 |  |  | 48.9 |  |  | 177.2 |
Gross profit (loss) | (5.5) |  |  | (4.3) |  |  | 35.5 |  |  | 6.8 |  |  | 32.5 |
Advanced technology costs | 6.6 |  |  | 5.1 |  |  | 1.3 |  |  | 1.6 |  |  | 14.6 |
Selling, general and administrative | 8.1 |  |  | 7.7 |  |  | 8.7 |  |  | 9.2 |  |  | 33.7 |
Amortization of intangible assets | 1.1 |  |  | 1.2 |  |  | 1.8 |  |  | 2.4 |  |  | 6.5 |
Special charges for workforce reductions | (0.1) |  |  | (2.9) |  |  | 0.8 |  |  | 0.3 |  |  | (1.9) |
Other (income) expense, net | (0.4) |  |  | (0.1) |  |  | (0.2) |  |  | — |  |  | (0.7) |
Operating income (loss) | (20.8) |  |  | (15.3) |  |  | 23.1 |  |  | (6.7) |  |  | (19.7) |
Nonoperating components of net periodic benefit expense (income) | (0.1) |  |  | — |  |  | (0.1) |  |  | (4.1) |  |  | (4.3) |
Interest expense | 1.0 |  |  | 1.0 |  |  | 0.9 |  |  | 0.1 |  |  | 3.0 |
Investment income | (0.7) |  |  | (0.7) |  |  | (0.5) |  |  | (0.3) |  |  | (2.2) |
Income tax (benefit) expense | (0.1) |  |  | — |  |  | — |  |  | 0.4 |  |  | 0.3 |
Net income (loss) | $ | (20.9) |  |  | $ | (15.6) |  |  | $ | 22.8 |  |  | $ | (2.8) |  |  | $ | (16.5) |
Preferred stock dividends - undeclared and cumulative | 2.0 |  |  | 2.0 |  |  | 1.9 |  |  | 1.9 |  |  | 7.8 |
Net income (loss) allocable to common stockholders | $ | (22.9) |  |  | $ | (17.6) |  |  | $ | 20.9 |  |  | $ | (4.7) |  |  | $ | (24.3) |
Net income (loss) per share: |  |  |  |  |  |  |  |  |
Basic | $ | (2.40) |  |  | $ | (1.84) |  |  | $ | 2.18 |  |  | $ | (0.49) |  |  | $ | (2.54) |
Diluted | $ | (2.40) |  |  | $ | (1.84) |  |  | $ | 2.17 |  |  | $ | (0.49) |  |  | $ | (2.54) |
The calculation of net income (loss) per share on a dilutive basis is provided in Note 15, Net Income (Loss) Per Share. No dilutive effect is recognized in periods in which a net loss has occurred or in which the assumed conversion effect of options or convertible securities is anti-dilutive.

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- Definition Quarterly Results of Operations (Unaudited) [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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