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Quarterly Data (unaudited) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Data (unaudited) | 15. Quarterly Data (unaudited)
Quarters (000's omitted, except per share data) |  |  |  |  |  |  |  |  |  |
2017 |  | First |  | Second |  | Third |  | Fourth |  | Total
Net sales |  | $ | 27,745 |  |  | $ | 38,849 |  |  | $ | 33,785 |  |  | $ | 30,171 |  |  | $ | 130,550 |
Cost of goods sold |  |  | 17,181 |  |  |  | 24,366 |  |  |  | 21,559 |  |  |  | 19,545 |  |  |  | 82,651 |
Gross profit |  |  | 10,564 |  |  |  | 14,483 |  |  |  | 12,226 |  |  |  | 10,626 |  |  |  | 47,899 |
Net income |  |  | 659 |  |  |  | 2,846 |  |  |  | 1,202 |  |  |  | (655 | ) |  |  | 4,052 |
Basic earnings per share |  | $ | 0.20 |  |  | $ | 0.85 |  |  | $ | 0.36 |  |  | $ | (0.20 | ) |  | $ | 1.21 |
Diluted earnings per share |  | $ | 0.18 |  |  | $ | 0.75 |  |  | $ | 0.32 |  |  | $ | (0.16 | ) |  | $ | 1.09 |
Dividends per share |  | $ | 0.10 |  |  | $ | 0.11 |  |  | $ | 0.11 |  |  | $ | 0.11 |  |  | $ | 0.43 |
2016 |  |  | First |  |  |  | Second |  |  |  | Third |  |  |  | Fourth |  |  |  | Total |
Net sales |  | $ | 25,288 |  |  | $ | 40,997 |  |  | $ | 31,913 |  |  | $ | 26,377 |  |  | $ | 124,574 |
Cost of goods sold |  |  | 16,103 |  |  |  | 26,302 |  |  |  | 20,050 |  |  |  | 16,564 |  |  |  | 79,019 |
Gross profit |  |  | 9,185 |  |  |  | 14,695 |  |  |  | 11,863 |  |  |  | 9,813 |  |  |  | 45,555 |
Net income |  |  | 565 |  |  |  | 3,267 |  |  |  | 1,473 |  |  |  | 545 |  |  |  | 5,851 |
Basic earnings per share |  | $ | 0.17 |  |  | $ | 0.98 |  |  | $ | 0.44 |  |  | $ | 0.16 |  |  | $ | 1.76 |
Diluted earnings per share |  | $ | 0.16 |  |  | $ | 0.91 |  |  | $ | 0.40 |  |  | $ | 0.15 |  |  | $ | 1.64 |
Dividends per share |  | $ | 0.10 |  |  | $ | 0.10 |  |  | $ | 0.10 |  |  | $ | 0.10 |  |  | $ | 0.40 |
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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- 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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