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Net Income (Loss) Per Share (Tables) | 3 Months Ended
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Mar. 31, 2018
Earnings Per Share [Abstract] |
Basic and Diluted Net Income Per Share | The basic and diluted net income (loss) per share calculation for the three months ended March 31, 2018 and 2017 was as follows:
| Three months ended March 31,
| 2018 |  | 2017
| (In thousands, except per share data)
Net income (loss) | $ | 2,720 |  |  | $ | (10,335 | )
Weighted-average shares outstanding — basic | 38,635 |  |  | 36,840 |
Effect of dilutive securities from stock award plans | 1,056 |  |  | — |
Weighted-average shares outstanding — diluted | $ | 39,691 |  |  | $ | 36,840 |
Net income (loss) per share - basic | $ | 0.07 |  |  | $ | (0.28 | )
Net income (loss) per share - diluted | $ | 0.07 |  |  | $ | (0.28 | )
Anti-dilutive weighted-average shares related to stock award plans | 1,113 |  |  | 4,236 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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