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Quarterly Results of Operations (Tables) | 12 Months Ended
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Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Results of Operations |
|  | Quarter ended |
|  | March 31 |  |  | June 30 |  |  | Sept. 30 |  |  | Dec. 31 |
|  | (In millions, except per share data) |
Year ended December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 27.9 |  |  | $ | 28.9 |  |  | $ | 26.5 |  |  | $ | 25.7 |
Gross margin |  |  | 8.6 |  |  |  | 9.1 |  |  |  | 8.1 |  |  |  | 7.6 |
Net income (loss) |  |  | 10.3 |  |  |  | (28.8 | ) |  |  | 1.2 |  |  |  | (5.4 | )
Net income (loss) attributable to NL stockholders |  |  | 10.0 |  |  |  | (29.2 | ) |  |  | 0.9 |  |  |  | (5.6 | )
Income (loss) per common share attributable to NL stockholders |  | $ | .21 |  |  | $ | (.60 | ) |  | $ | .02 |  |  | $ | (.11 | )
Year ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 27.1 |  |  | $ | 27.1 |  |  | $ | 28.4 |  |  | $ | 26.3 |
Gross margin |  |  | 8.2 |  |  |  | 8.5 |  |  |  | 9.4 |  |  |  | 9.1 |
Net income (loss) |  |  | (2.2 | ) |  |  | 1.2 |  |  |  | 7.8 |  |  |  | 10.0 |
Net income (loss) attributable to NL stockholders |  |  | (2.5 | ) |  |  | 0.8 |  |  |  | 7.4 |  |  |  | 9.6 |
Income (loss) per common share attributable to NL stockholders |  | $ | (.05 | ) |  | $ | .02 |  |  | $ | .15 |  |  | $ | .20 |

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=68076893&loc=d3e1280-108306 + Details
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