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Quarterly Results of Operations (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract] |
Summary of Unaudited Quarterly Results of Operations | The following summarizes the unaudited quarterly results of operations for the years ended December 31, 2015 and 2014.
|  | Year ended December 31, 2015 |
|  | March 31 |  |  | June 30 |  |  | Sept. 30 |  |  | Dec. 31 |
Net sales |  | $ | 163,746 |  |  | $ | 164,856 |  |  | $ | 154,824 |  |  | $ | 183,854 |
Income from operations |  | $ | 13,934 |  |  | $ | 13,589 |  |  | $ | 10,122 |  |  | $ | (10,848 | )
Net income |  | $ | 6,001 |  |  | $ | 6,953 |  |  | $ | 4,630 |  |  | $ | (25,015 | )
Basic net income per share |  | $ | 0.32 |  |  | $ | 0.36 |  |  | $ | 0.17 |  |  | $ | (0.93 | )
Diluted net income per share |  | $ | 0.31 |  |  | $ | 0.36 |  |  | $ | 0.17 |  |  | $ | (0.93 | )
Weighted average shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic number of shares |  |  | 18,996 |  |  |  | 19,215 |  |  |  | 26,839 |  |  |  | 26,840 |
Effect of dilutive stock options |  |  | 384 |  |  |  | 367 |  |  |  | 328 |  |  |  | — |
Diluted number of shares |  |  | 19,380 |  |  |  | 19,582 |  |  |  | 27,167 |  |  |  | 26,840 |
|  | Year ended December 31, 2014 |
|  | March 31 |  |  | June 30 |  |  | Sept. 30 |  |  | Dec. 31 |
Net sales |  | $ | 102,528 |  |  | $ | 106,680 |  |  | $ | 125,632 |  |  | $ | 153,761 |
Income from operations |  | $ | 8,338 |  |  | $ | 8,237 |  |  | $ | 2,552 |  |  | $ | 8,560 |
Net income |  | $ | 5,238 |  |  | $ | 5,200 |  |  | $ | (3,840 | ) |  | $ | 1,619 |
Basic net income per share |  | $ | 0.30 |  |  | $ | 0.29 |  |  | $ | (0.21 | ) |  | $ | 0.09 |
Diluted net income per share |  | $ | 0.29 |  |  | $ | 0.29 |  |  | $ | (0.21 | ) |  | $ | 0.08 |
Weighted average shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic number of shares |  |  | 17,656 |  |  |  | 17,779 |  |  |  | 17,979 |  |  |  | 18,970 |
Effect of dilutive stock options |  |  | 306 |  |  |  | 393 |  |  |  | — |  |  |  | 347 |
Diluted number of shares |  |  | 17,962 |  |  |  | 18,172 |  |  |  | 17,979 |  |  |  | 19,317 |

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and 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=51825399&loc=d3e1280-108306 + Details
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