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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2021
Accounting Policies [Abstract] |
Schedule of Antidilutive Securities Excluded from the Calculation of Diluted Net Loss per Share | The following table sets forth the outstanding potentially dilutive securities that have been excluded in the calculation of diluted net loss per share because their effect was anti-dilutive:
| September 30,
| 2021 |  | 2020
Options to purchase Common Stock | 3,566,832 |  |  | 1,920,706 |
Warrants to purchase Common Stock | 4,490,159 |  |  | 7,373,351 |
Restricted Stock Units | — |  |  | 991 |
Series A Convertible Preferred Stock | 877 |  |  | 877 |
Series E Convertible Preferred Stock | 2,684,607 |  |  | 3,548,459 |
| 10,742,475 |  |  | 12,844,384 |

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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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