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Net Loss per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2021
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, 2021 and 2020 because their effects would be anti-dilutive:
|  | September 30, |
|  | 2021 |  |  | 2020 |
Stock options |  |  | 1,698,249 |  |  |  | 499 |
Common stock warrants - equity |  |  | 3,894,509 |  |  |  | 3,991,373 |
Common stock reserved for conversion of preferred shares |  |  | 1,170,721 |  |  |  | 2,147,394 |
Assumed conversion of convertible notes |  |  | 488,031 |  |  |  | 146,288 |
Total |  |  | 7,251,510 |  |  |  | 6,285,554 |
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, 2021 and 2020:
| Three months ended September 30, |  |  | Nine months ended September 30, |
| 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Weighted average shares issued |  | 7,354,428 |  |  |  | 3,917,593 |  |  |  | 6,665,826 |  |  |  | 2,015,863 |
Weighted average pre-funded warrants |  | 233,215 |  |  |  | 371,000 |  |  |  | 257,715 |  |  |  | 201,748 |
Weighted average shares outstanding |  | 7,587,643 |  |  |  | 4,288,593 |  |  |  | 6,923,541 |  |  |  | 2,217,611 |

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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=124432515&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=124432515&loc=d3e3550-109257 + Details
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