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STOCKHOLDERS' EQUITY (Series C Warrants) (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2018 | Apr. 30, 2018 | Feb. 28, 2018 | Nov. 30, 2017 | Dec. 31, 2019 | Dec. 31, 2018
Class of Stock [Line Items] |  |  |  |  |  |
Underlying shares (in shares) |  |  |  |  | 909,189 |
Deemed dividend |  |  |  |  | $ 0 | $ 4,222,000
Warrants exercised |  |  |  |  | 20,000 |
Series C Warrants [Member] |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Underlying shares (in shares) |  |  |  | 130,857 |  |
Exercise price (in dollars per share) |  |  |  | $ 24.45 |  |
Class of warrant or right, term |  |  |  | 5 years |  |
Percentage of outstanding shares owned threshold prior to exercise of warrants |  |  |  | 4.99% |  |
Percentage of outstanding shares owned threshold after exercise of warrants |  |  |  | 9.99% |  |
2018 Purchase Agreement | Deemed Dividend R |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividend |  |  |  |  |  | 58,000
2018 Purchase Agreement | Deemed Dividend J |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividend |  |  |  |  |  | 8,000
2018 Purchase Agreement | Series C Warrants [Member] |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Exercise price (in dollars per share) |  |  | $ 15.60 |  | $ 11.25 |
2018 Purchase Agreement | Series C Warrants [Member] | Deemed Dividend R |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividend |  |  | $ 58,000 |  |  |
2018 Note Agreement |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Exercise price (in dollars per share) | $ 2.25 | $ 4.50 |  |  |  |
2018 Note Agreement | Deemed Dividend S |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividend |  |  |  |  |  | $ 45,000
2018 Note Agreement | Series C Warrants [Member] |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Exercise price (in dollars per share) | $ 2.25 | $ 4.50 |  |  |  |
Warrants exercised |  |  |  |  | 25,037 | 105,820
Proceeds from issuance of warrants |  |  |  |  | $ 56,000 | $ 476,000
Intrinsic value of warrants exercised in period |  |  |  |  | $ 443,000 | $ 294,000
2018 Note Agreement | Series C Warrants [Member] | Deemed Dividend S |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividend |  | $ 45,000 |  |  |  |
2018 Note Agreement | Series C Warrants [Member] | Deemed Dividend T |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividend | $ 4,000 |  |  |  |  |

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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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