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STOCKHOLDERS' EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2020
STOCKHOLDERS' EQUITY |
Schedule of Outstanding Warrants to Purchase Common Stock | The following table summarizes information with regard to outstanding warrants to purchase common stock as of December 31, 2020:
|  | Number of Shares |  |  |  |  |
|  | Issuable Upon |  |  |  |  |
|  | Exercise of |  |  |  |  |
|  | Outstanding |  | Exercise |  |
Offering |  | Warrants |  | Price |  | Expiration Date
June 2020 Series H Warrants |  | 8,213,289 |  | $ | 1.21 |  | June 5, 2025
May 2019 Series F Warrants |  | 1,957,000 |  | $ | 2.40 |  | May 20, 2024
May 2019 Series G Warrants |  | 2,018,000 |  | $ | 2.40 |  | May 20, 2024
July 2018 Series E Warrants |  | 4,140,000 |  | $ | 4.00 |  | July 31, 2023
October 2017 Series D Warrants |  | 310,856 |  | $ | 17.80 |  | October 14, 2024
November 2016 Public Offering Series C |  | 415,785 |  | $ | 15.00 |  | November 29, 2021
April 2016 Underwritten Registered Series A |  | 362,694 |  | $ | 30.40 |  | April 20,2021
October 2015 Incremental Series A |  | 30,006 |  | $ | 21.30 |  | October 20,2021
October 2015 Private Placement Series A |  | 8,636 |  | $ | 21.30 |  | April 1, 2021
Total |  | 17,456,266 |  |  |  |  |

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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 + Details
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