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STOCKHOLDERS' EQUITY (Note Conversion Warrants) (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Feb. 12, 2019 | Jul. 31, 2017 | Mar. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018 | Aug. 31, 2017
Class of Stock [Line Items] |  |  |  |  |  |
Conversion of debt into stock | $ 1,900,000 |  |  | $ 200,000 |  |
Conversion of convertible notes into common stock (in shares) | 120,983 |  |  | 93,333 |  |
2018 Inducement Agreement |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividend |  |  |  |  | $ 3,514,000 |
2018 Inducement Agreement | Deemed Dividend G |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividend |  |  |  |  | 5,000 |
2018 Purchase Agreement | Deemed Dividend J |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividend |  |  |  |  | 58,000 |
2018 Purchase Agreement | Deemed Dividend F |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividend |  |  |  |  | $ 8,000 |
Bridge Loan | 2018 Inducement Agreement | Deemed Dividend G |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividend |  |  | $ 5,000 |  |  |
Bridge Loan | 2018 Purchase Agreement | Deemed Dividend F |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Deemed dividend |  |  | $ 8,000 |  |  |
Bridge Loan | Common Stock |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Conversion of convertible notes into common stock (in shares) |  | 23,999 |  |  |  |
Exercise price (in dollars per share) |  |  | $ 21.00 |  |  | $ 45.00
Bridge Loan | Common Stock | 2018 Inducement Agreement |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Exercise price (in dollars per share) |  |  | 11.25 |  |  |
Bridge Loan | Common Stock | 2018 Purchase Agreement |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Exercise price (in dollars per share) |  |  | $ 15.60 |  |  |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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