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STOCKHOLDERS' EQUITY (Tables) | 6 Months Ended
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Jun. 30, 2023
STOCKHOLDERS' EQUITY [Abstract] |
Schedule of stockholders' equity, including warrants and rights | The following represents a summary of the warrants outstanding as of June 30, 2023:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ |  | Underlying |  | Exercise
​ | ​ | Issue Year | ​ | Expiration | ​ | Shares | ​ | Price
Warrants | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(1) | ​ | 2018 | ​ | July 2023 | ​ | 29,343 | ​ | $ | 5.40
(2) | ​ | 2018 | ​ | August 2023 | ​ | 41,806 | ​ | $ | 5.40
(3) | ​ | 2018 | ​ | September 2023 | ​ | 40,719 | ​ | $ | 5.40
(4) | ​ | 2018 | ​ | November 2023 | ​ | 75,788 | ​ | $ | 5.40
(5) | ​ | 2018 | ​ | December 2023 | ​ | 51,282 | ​ | $ | 5.40
(6) | ​ | 2019 | ​ | April 2024 | ​ | 147,472 | ​ | $ | 5.40
(7) | ​ | 2019 | ​ | May 2024 | ​ | 154,343 | ​ | $ | 9.56
(8) | ​ | 2023 | ​ | None | ​ | 319,445 | ​ | $ | 0.001
(9) | ​ | 2023 | ​ | December 2028 | ​ | 8,888,890 | ​ | $ | 0.63
​ |  |  |  |  |  | 9,749,088 |  | ​ |
(1) - (6)These warrants were issued in connection with a 2018 securities purchase agreement, as amended. (7) These warrants were issued in connection with convertible notes issued in May 2019. (8) – (9) These warrants were issued in connection with the 2023 registered direct offering and concurrent private placement and are the pre-funded warrants and RDO common warrants discussed below. ​

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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 https://asc.fasb.org/extlink&oid=128089324&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 https://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 + Details
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