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Net Loss Per Share (Tables) | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Outstanding Stock Options and Stock Awards Excluded from Calculation of Net Loss Per Share | The following were excluded from the calculation of diluted net loss per share as the effect of their inclusion would have been anti-dilutive.
| Three Months Ended |  |  | Six Months Ended |
| June 30, |  |  | June 30, |
| 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Outstanding securities not included in diluted net loss per share calculation (in thousands): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options and stock awards |  | 11,276 |  |  |  | 10,950 |  |  |  | 11,276 |  |  |  | 10,950 |
Series B Convertible Preferred Stock (as converted to common stock) |  | 4,140 |  |  |  | - |  |  |  | 4,140 |  |  |  | - |
Warrants (as exercisable into common stock) |  | 5,841 |  |  |  | - |  |  |  | 5,841 |  |  |  | - |
|  | 21,257 |  |  |  | 10,950 |  |  |  | 21,257 |  |  |  | 10,950 |

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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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