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Selected Quarterly Financial Information (unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2017
Selected Quarterly Financial Information (unaudited) |
Schedule of unaudited quarterly financial data |
|  | Fiscal 2017 |  | Fiscal 2016 |
|  | Q1 |  | Q2 |  | Q3 |  | Q4 |  | Q1 |  | Q2 |  | Q3 |  | Q4 |
|  | (in thousands, except per share amounts) |
Net sales |  | $ | 94,386 |  | $ | 115,066 |  | $ | 131,872 |  | $ | 143,432 |  | $ | 78,011 |  | $ | 75,348 |  | $ | 85,482 |  | $ | 93,609 |
Gross profit |  | 34,200 |  | 38,720 |  | 53,061 |  | 58,337 |  | 31,956 |  | 31,439 |  | 33,455 |  | 36,008 |
Net income (loss) |  | 1,095 |  | (18,388 | ) | (21,884 | ) | (5,616 | ) | (15,533 | ) | (32,082 | ) | (69,598 | ) | (4,998 | )
Basic income (loss) per common share |  | 0.03 |  | (0.43 | ) | (0.47 | ) | (0.12 | ) | (0.40 | ) | (0.82 | ) | (1.78 | ) | (0.13 | )
Diluted income (loss) per common share |  | 0.03 |  | (0.43 | ) | (0.47 | ) | (0.12 | ) | (0.40 | ) | (0.82 | ) | (1.78 | ) | (0.13 | )

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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=68076893&loc=d3e1280-108306 + Details
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