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Net Income Per Share (Tables) | 12 Months Ended
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Dec. 31, 2018
Earnings Per Share [Abstract] |
Components of Computation of Basic and Diluted Net Income Per Share | The following table presents the components of the computation of basic and diluted net income per share for the periods indicated (in thousands, except per share amounts):
|  | Year Ended December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Numerator |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 23,872 |  |  | $ | 351 |  |  | $ | 4,963 |
Denominator |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding, basic |  |  | 17,196 |  |  |  | 17,183 |  |  |  | 16,947 |
Options to purchase common stock |  |  | 306 |  |  |  | 150 |  |  |  | 267 |
Restricted stock units |  |  | 104 |  |  |  | 23 |  |  |  | 27 |
Weighted average common shares outstanding, diluted |  |  | 17,606 |  |  |  | 17,356 |  |  |  | 17,241 |
Net income per share |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.39 |  |  | $ | 0.02 |  |  | $ | 0.29 |
Diluted |  | $ | 1.36 |  |  | $ | 0.02 |  |  | $ | 0.29 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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