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Net Income Per Share (Tables) | 9 Months Ended
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Sep. 30, 2017
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The computations for basic and diluted net income per share are as follows:
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
| (in thousands, except per share data)
Numerator: |  |  |  |  |  |  |
Net income | $ | 8,452 |  |  | $ | 4,996 |  |  | $ | 37,584 |  |  | $ | 13,317 |
Denominator: |  |  |  |  |  |  |
Weighted-average shares used in computing net income per share: |  |  |  |  |  |  |
Basic | 37,703 |  |  | 35,477 |  |  | 37,162 |  |  | 35,074 |
Effect of potentially dilutive securities: |  |  |  |  |  |  |
Common stock options | 2,199 |  |  | 3,103 |  |  | 2,161 |  |  | 3,089 |
Restricted stock units | 397 |  |  | 132 |  |  | 278 |  |  | 42 |
Diluted | 40,299 |  |  | 38,712 |  |  | 39,601 |  |  | 38,205 |
Net income per share: |  |  |  |  |  |  |
Basic | $ | 0.22 |  |  | $ | 0.14 |  |  | $ | 1.01 |  |  | $ | 0.38 |
Diluted | $ | 0.21 |  |  | $ | 0.13 |  |  | $ | 0.95 |  |  | $ | 0.35 |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | Potentially dilutive securities not included in the calculation of diluted net income per share because doing so would be antidilutive are as follows:
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
| (in thousands)
Common stock options | 651 |  |  | 2,881 |  |  | 1,244 |  |  | 3,594 |
Restricted stock units | — |  |  | — |  |  | — |  |  | 38 |
| 651 |  |  | 2,881 |  |  | 1,244 |  |  | 3,632 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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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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