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Quarterly Data (unaudited) | 12 Months Ended
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Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Data (unaudited) | 15. Quarterly Data (unaudited) Quarters (000's omitted, except per share data)
2015 |  | First |  | Second |  | Third |  | Fourth |  | Total
Net sales |  | $ | 22,837 |  |  | $ | 33,954 |  |  | $ | 29,903 |  |  | $ | 23,118 |  |  | $ | 109,812 |
Cost of goods sold |  |  | 14,402 |  |  |  | 21,419 |  |  |  | 19,578 |  |  |  | 14,852 |  |  |  | 70,251 |
Net income |  |  | 436 |  |  |  | 2,710 |  |  |  | 1,208 |  |  |  | 440 |  |  |  | 4,794 |
Basic earnings per share |  | $ | 0.13 |  |  | $ | 0.82 |  |  | $ | 0.36 |  |  | $ | 0.12 |  |  | $ | 1.44 |
Diluted earnings per share |  | $ | 0.12 |  |  | $ | 0.74 |  |  | $ | 0.33 |  |  | $ | 0.11 |  |  | $ | 1.30 |
Dividends per share |  | $ | 0.09 |  |  | $ | 0.09 |  |  | $ | 0.09 |  |  | $ | 0.10 |  |  | $ | 0.37 |
2014 |  |  | First |  |  |  | Second |  |  |  | Third |  |  |  | Fourth |  |  |  | Total |
Net sales |  | $ | 19,152 |  |  | $ | 33,396 |  |  | $ | 30,008 |  |  | $ | 24,666 |  |  | $ | 107,222 |
Cost of goods sold |  |  | 12,275 |  |  |  | 21,675 |  |  |  | 19,393 |  |  |  | 15,694 |  |  |  | 69,037 |
Net income |  |  | 368 |  |  |  | 2,543 |  |  |  | 1,189 |  |  |  | 689 |  |  |  | 4,789 |
Basic earnings per share |  | $ | 0.12 |  |  | $ | 0.79 |  |  | $ | 0.37 |  |  | $ | 0.21 |  |  | $ | 1.48 |
Diluted earnings per share |  | $ | 0.11 |  |  | $ | 0.72 |  |  | $ | 0.34 |  |  | $ | 0.19 |  |  | $ | 1.36 |
Dividends per share |  | $ | 0.08 |  |  | $ | 0.08 |  |  | $ | 0.09 |  |  | $ | 0.09 |  |  | $ | 0.34 |
Earnings per share were computed independently for each of the quarters presented. Therefore, the sum of the four quarterly earnings per share amounts may not necessarily equal the earnings per share for the year.

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e765-108305 Reference 2: 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e725-108305 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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