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Net Loss per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2020
Earnings Per Share [Abstract] |
Anti-dilutive securities excluded from the computation of earnings per share | The following potentially dilutive securities were excluded from the computation of earnings per share as of September 30, 2020 and 2019 because their effects would be anti-dilutive:
|  | September 30, |
|  | 2020 |  |  | 2019 |
Stock options |  |  | 499 |  |  |  | 1,643 |
Common stock warrants - equity |  |  | 3,991,373 |  |  |  | - |
Common stock warrants - liabilities |  |  | — |  |  |  | 1,001,962 |
Common stock reserved for conversion of preferred shares |  |  | 2,147,394 |  |  |  | 1,001,962 |
Assumed conversion of convertible notes |  |  | 146,288 |  |  |  | 31,746 |
Total |  |  | 6,285,554 |  |  |  | 2,037,313 |
Calculation of net loss and number of shares used to compute basic and diluted earnings per share | The following table reconciles net loss per share for the three and nine months ended September 30, 2020 and 2019:
| Three months ended September 30, |  |  | Nine months ended September 30, |
(in thousands, except share data) | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Net loss | $ | (4,991 | ) |  | $ | (7,519 | ) |  | $ | (17,127 | ) |  | $ | (21,371 | )
Deemed dividend for triggering of warrant down round feature |  | — |  |  |  | — |  |  |  | (55 | ) |  |  | — |
Net loss attributable to common stockholders | $ | (4,991 | ) |  | $ | (7,519 | ) |  | $ | (17,182 | ) |  | $ | (21,371 | )
Weighted average shares outstanding - basic* |  | 4,288,593 |  |  |  | 101,862 |  |  |  | 2,217,611 |  |  |  | 102,956 |
Weighted average shares outstanding - diluted* |  | 4,288,593 |  |  |  | 101,862 |  |  |  | 2,217,611 |  |  |  | 102,956 |
Net loss per share - basic* | $ | (1.16 | ) |  | $ | (73.82 | ) |  | $ | (7.75 | ) |  | $ | (207.58 | )
Net loss per share - diluted* | $ | (1.16 | ) |  | $ | (73.82 | ) |  | $ | (7.75 | ) |  | $ | (207.58 | )
* reflects, one-for-seven hundred (1:700) reverse stock split effected on December 24, 2019. |
Summary of reconciliation of weighted average shares outstanding calculation | The following table provides a reconciliation of the weighted average shares outstanding calculation for the three and nine months ended September 30, 2020 and 2019:
| Three months ended September 30, |  |  | Nine months ended September 30, |
| 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Weighted average shares issued |  | 3,917,593 |  |  |  | 25,587 |  |  |  | 2,015,863 |  |  |  | 26,681 |
Weighted average pre-funded warrants |  | 371,000 |  |  |  | 76,275 |  |  |  | 201,748 |  |  |  | 76,275 |
Weighted average shares outstanding |  | 4,288,593 |  |  |  | 101,862 |  |  |  | 2,217,611 |  |  |  | 102,956 |

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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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- 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + 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 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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