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Note 17 - Quarterly Data and Share Information (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Quarterly Financial Information [Table Text Block] |
|  | FISCAL YEAR 201 7 |
|  | FIRST QUARTER (1) |  |  | SECOND QUARTER |  |  | THIRD QUARTER |  |  | FOURTH QUARTER ( 2 ) |
|  | (in thousands, except per share data) |
Net sales |  | $ | 221,102 |  |  | $ | 251,700 |  |  | $ | 257,431 |  |  | $ | 266,210 |
Gross profit |  |  | 87,802 |  |  |  | 97,897 |  |  |  | 98,544 |  |  |  | 101,778 |
Net income |  |  | 8,547 |  |  |  | 20,938 |  |  |  | 19,439 |  |  |  | 4,322 |
Basic income per share |  | $ | 0.13 |  |  | $ | 0.33 |  |  | $ | 0.32 |  |  | $ | 0.07 |
Diluted income per share |  | $ | 0.13 |  |  | $ | 0.33 |  |  | $ | 0.32 |  |  | $ | 0.07 |
Share prices |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
High |  | $ | 19.93 |  |  | $ | 21.05 |  |  | $ | 22.60 |  |  | $ | 25.70 |
Low |  | $ | 17.18 |  |  | $ | 18.15 |  |  | $ | 18.30 |  |  | $ | 21.21 |
|  | FISCAL YEAR 20 16 |
|  | FIRST QUARTER |  |  | SECOND QUARTER |  |  | THIRD QUARTER |  |  | FOURTH QUARTER (1 ) |
|  | (in thousands, except per share data) |
Net sales |  | $ | 222,554 |  |  | $ | 248,207 |  |  | $ | 248,349 |  |  | $ | 239,507 |
Gross profit |  |  | 86,632 |  |  |  | 99,126 |  |  |  | 92,918 |  |  |  | 89,968 |
Net income |  |  | 12,894 |  |  |  | 20,657 |  |  |  | 15,904 |  |  |  | 4,707 |
Basic income per share |  | $ | 0.20 |  |  | $ | 0.32 |  |  | $ | 0.25 |  |  | $ | 0.07 |
Diluted income per share |  | $ | 0.20 |  |  | $ | 0.32 |  |  | $ | 0.25 |  |  | $ | 0.07 |
Share prices |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
High |  | $ | 18.99 |  |  | $ | 18.71 |  |  | $ | 18.45 |  |  | $ | 19.10 |
Low |  | $ | 13.70 |  |  | $ | 14.56 |  |  | $ | 15.02 |  |  | $ | 14.59 |

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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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