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NET INCOME (LOSS) PER SHARE (Tables) | 6 Months Ended
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Jun. 30, 2017
Earnings Per Share [Abstract] |
Schedule of computation of basic and diluted loss per share | The following table sets forth the computation of basic and diluted net income (loss) per share for the three and six months ended June 30, 2017 and 2016 (in thousands, except per share amounts):
| Three Months Ended June 30, |  | Six Months Ended June 30,
2017 |  | 2016 |  | 2017 |  | 2016
Numerator: |  |  |  |  |  |  |
Net loss | $ | (19,743 | ) |  | $ | (7,958 | ) |  | $ | (39,609 | ) |  | $ | (11,812 | )
Denominator: |  |  |  |  |  |  |
Weighted average common shares outstanding | 40,160 |  |  | 37,181 |  |  | 39,079 |  |  | 37,101 |
Net loss per share: |  |  |  |  |  |  |
Basic and diluted net loss per common share | $ | (0.49 | ) |  | $ | (0.21 | ) |  | $ | (1.01 | ) |  | $ | (0.32 | )
Schedule of potential dilutive effect of the securities excluded from the calculation of diluted loss per share | The following outstanding stock options, RSUs, conversion premiums on the Company’s convertible senior notes, warrants and ESPP purchase options are antidilutive in the periods presented (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Weighted average number of stock options | 5,092 |  |  | 4,254 |  |  | 5,102 |  |  | 4,288 |
Weighted average number of RSUs | 375 |  |  | 218 |  |  | 364 |  |  | 212 |
Conversion premium on the 2019 Notes | 9 |  |  | 2,364 |  |  | 817 |  |  | 2,557 |
Weighted average number of warrants | — |  |  | — |  |  | — |  |  | 1 |
Weighted average ESPP purchase options | 36 |  |  | — |  |  | 37 |  |  | 12 |
Total | 5,512 |  |  | 6,836 |  |  | 6,320 |  |  | 7,070 |

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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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