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Net Loss per Share of Common Stock (Tables) | 12 Months Ended
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Dec. 31, 2015
Earnings Per Share [Abstract] |
Outstanding securities considered anti-dilutive | The following table shows the weighted-average outstanding securities considered anti-dilutive and therefore excluded from the computation of diluted net loss per share (in thousands):
|  | Year Ended December 31, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Common stock options and RSUs |  |  | 11,011 |  |  |  | 6,666 |  |  |  | 7,087 |
Warrants for common stock |  |  | 19,210 |  |  |  | 2,073 |  |  |  | 15,839 |
Total |  |  | 30,221 |  |  |  | 8,739 |  |  |  | 22,926 |
Reconciliation of the numerators and denominators used in calculating basic and diluted net loss per share of common stock | The following is a reconciliation of the numerators and denominators used in calculating basic and diluted net loss per share of common stock (in thousands):
|  | Year Ended December 31, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Numerator |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ | (20,606 | ) |  | $ | (38,301 | ) |  | $ | (124,058 | )
Basic |  |  |  |  |  |  |  |  |  |  |  |
Adjustment for revaluation of contingent warrant liabilities |  |  | — |  |  |  | (39,512 | ) |  |  | — |
Diluted |  | $ | (20,606 | ) |  | $ | (77,813 | ) |  | $ | (124,058 | )
Denominator |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding used for basic net loss per share |  |  | 117,803 |  |  |  | 107,435 |  |  |  | 86,938 |
Effect of dilutive warrants |  |  | — |  |  |  | 7,898 |  |  |  | — |
Weighted average shares outstanding and dilutive securities used for diluted net loss per share |  |  | 117,803 |  |  |  | 115,333 |  |  |  | 86,938 |

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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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