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STOCKHOLDERS' EQUITY (Series C Warrants) (Details) - USD ($) | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2017
Class of Stock [Line Items] |  |  |  |  |  |
Underlying shares (in shares) | 906,769 |  | 906,769 |  |  |
Deemed dividend | $ 0 | $ 0 |  | $ 0 |  |
Series C Warrants [Member] |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Underlying shares (in shares) |  |  |  |  |  | 130,857
Exercise price (in dollars per share) |  |  |  |  |  | $ 24.45
Warrants exercised |  | 25,037 |  | 25,037 |  |
Proceeds from issuance of warrants |  | $ 56,000 |  | $ 56,000 |  |
Intrinsic value of warrants exercised in period |  | $ 43,000 |  | $ 43,000 |  |
Class of Warrant or Right, Outstanding | 0 |  | 0 |  | 0 |
2018 Inducement Agreement |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividend |  |  | $ 3,344,000 |  |  |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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