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STOCKHOLDERS' EQUITY (Note Conversion Warrants) (Details) - USD ($) |  |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Feb. 12, 2018 | Jun. 29, 2017 | Apr. 28, 2017 | Nov. 30, 2018 | Apr. 30, 2018 | Aug. 31, 2017 | Jul. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2017
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Debt converted | $ 1,900,000 |  |  |  |  |  |  | $ 3,191,000 |  |
Conversion of debt into stock (in shares) | 1,814,754 |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt and induced conversion of convertible bridge notes |  |  |  |  |  |  |  | 1,328,000 |  |
Deemed dividend |  |  |  |  |  |  |  | $ 4,222,000 | $ 12,431,000 |
Series A Conversion Warrants [Member] |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Class of warrant or right, term |  |  |  |  |  |  |  | 5 years |  |
2018 Inducement Agreement | Deemed Dividend K |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Deemed dividend |  |  |  |  |  |  |  | $ 5,000 |  |
2018 Purchase Agreement | Deemed Dividend J |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Deemed dividend |  |  |  |  |  |  |  | 8,000 |  |
2018 Note Agreement |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Exercise price (in dollars per share) |  |  |  | $ 0.15 | $ 0.30 |  |  |  |  |
2018 Note Agreement | Deemed Dividend L |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Deemed dividend |  |  |  |  | $ 10,000 |  |  | $ 10,000 |  |
2018 Note Agreement | Deemed Dividend M |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Deemed dividend |  |  |  | $ 4,000 |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Conversion of debt into stock (in shares) |  | 1,414,700 |  |  |  |  |  | 3,787,300 |  |
Exercise price (in dollars per share) |  | $ 7.50 |  |  |  |  |  |  |  |
Bridge Loan |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Debt converted |  |  | $ 900,000 |  |  | $ 900,000 | $ 900,000 |  |  |
Loss on extinguishment of debt and induced conversion of convertible bridge notes |  |  |  |  |  |  |  | $ 1,000,000 |  |
Round Down |  |  |  |  |  |  |  |  | $ 28,000 |
Bridge Loan | 2018 Inducement Agreement | Deemed Dividend K |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Deemed dividend |  |  |  |  |  |  |  | 5,000 |  |
Bridge Loan | 2018 Purchase Agreement | Deemed Dividend J |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Deemed dividend |  |  |  |  |  |  |  | $ 8,000 |  |
Bridge Loan | Common Stock |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Conversion of debt into stock (in shares) |  |  | 359,999 |  |  | 359,999 | 359,999 |  |  |
Exercise price (in dollars per share) |  |  |  |  |  | $ 3.00 |  |  | $ 1.40 | $ 7.50
Loss on extinguishment of debt and induced conversion of convertible bridge notes |  |  |  |  |  | $ 1,000,000 |  |  |  |
Bridge Loan | Common Stock | 2018 Inducement Agreement |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Exercise price (in dollars per share) |  |  |  |  |  |  |  | $ 0.75 |  |
Bridge Loan | Common Stock | 2018 Purchase Agreement |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Exercise price (in dollars per share) |  |  |  |  |  |  |  | $ 1.04 |  |

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