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STOCKHOLDERS' EQUITY (Remaining Warrants) (Details) - USD ($) $ / shares in Units, $ in Millions |  | 1 Months Ended | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 20, 2018 | Apr. 30, 2018 | Dec. 31, 2018 | Sep. 30, 2018 | Mar. 31, 2019 | Sep. 20, 2018 | Sep. 19, 2018 | Feb. 28, 2018 | Dec. 31, 2017
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Class of warrant, number of securities called by warrants |  |  |  |  | 917,563 |  |  |  |
Creditor Warrants Relating to Secured Debt [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Class of warrant, number of securities called by warrants |  |  |  |  |  |  |  | 7,207 | 7,207
Exercise price (in dollars per share) |  |  |  |  |  |  |  | $ 112.50 |
April 2018 Warrants |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) |  | 243,223 |  |  |  |  |  |  |
Exercise price (in dollars per share) |  |  |  |  |  | $ 7.50 | $ 11.25 |  |
Warrants, fair value |  | $ 1.1 |  |  |  |  |  |  |
April 2018 Warrants, First Half |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Class of warrant or right, term | 5 years |  |  |  |  |  |  |  |
April 2018 Warrants, Second Half |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Class of warrant or right, term | 1 year |  |  |  |  |  |  |  |
Advisor Warrants |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) |  | 15,466 |  |  |  |  |  |  |
Quarter 3 2018 Warrants |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) |  |  |  | 196,337 |  |  |  |  |
Warrants, fair value |  |  |  | $ 0.7 |  |  |  |  |
Warrants Not Assumed In Merger, Expiring November 2023 [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Class of warrant, number of securities called by warrants |  |  |  |  | 138,941 |  |  |  |
Exercise price (in dollars per share) |  |  |  |  | $ 5.40 |  |  |  |
Warrants Not Assumed In Merger, Expiring December 2023 [Member] |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Class of warrant, number of securities called by warrants |  |  |  |  | 161,172 |  |  |  |
Exercise price (in dollars per share) |  |  |  |  | $ 5.40 |  |  |  |
Quarter 4 2018 Warrants |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) |  |  | 300,114 |  |  |  |  |  |
2018 Note Agreement | Advisor Warrants |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |
Stock rights issued (in shares) |  | 15,466 |  |  |  |  |  |  |

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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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- 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://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)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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