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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Selected Quarterly Financial Data | Selected quarterly financial data for 2017 and 2016 are as follows:
| Three Months Ended
| March |  | June |  | September |  | December
2017 |  |  |  |  |  |  |
Net sales | $ | 186,567 |  |  | $ | 197,154 |  |  | $ | 190,117 |  |  | $ | 222,555 |
Gross profit | 99,885 |  |  | 104,652 |  |  | 102,547 |  |  | 123,958 |
Net income (loss) | (4,545 | ) |  | 6,139 |  |  | 7,197 |  |  | 46,696 |
EPS: |  |  |  |  |  |  |  |  |  |  |
Basic | $ | (.16 | ) |  | $ | .22 |  |  | $ | .26 |  |  | $ | 1.67 |
Diluted | (.16 | ) |  | .22 |  |  | .26 |  |  | 1.65 |
| Three Months Ended
| March |  | June |  | September |  | December
2016 |  |  |  |  |  |  |
Net sales | $ | 181,201 |  |  | $ | 193,433 |  |  | $ | 184,792 |  |  | $ | 204,094 |
Gross profit | 97,740 |  |  | 102,422 |  |  | 101,209 |  |  | 106,959 |
Net income (loss) | (2,265 | ) |  | 2,884 |  |  | 7,337 |  |  | 6,708 |
EPS: |  |  |  |  |  |  |  |  |  |  |
Basic | $ | (.08 | ) |  | $ | .10 |  |  | $ | .26 |  |  | $ | .24 |
Diluted | (.08 | ) |  | .10 |  |  | .26 |  |  | .24 |

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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=84173487&loc=d3e1280-108306 + Details
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