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Organization and Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Outstanding anti-dilutive securities not included in diluted net loss per share | Outstanding anti-dilutive securities not included in the diluted net loss per share attributable to common stockholders calculations were as follows:
| Three Months Ended March 31,
(In millions) | 2019 |  | 2018
Options outstanding to purchase common stock | — |  |  | 0.4 |
Unvested restricted stock units | 2.3 |  |  | 3.1 |
Senior convertible notes due 2022 | 4.0 |  |  | 4.0 |
Senior convertible notes due 2023 | 5.2 |  |  | — |
Warrants | 5.2 |  |  | — |
Total | 16.7 |  |  | 7.5 |

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