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CONVERTIBLE NOTES (Convertible Bridge Notes) (Details) - USD ($) |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Feb. 12, 2018 | Jun. 29, 2017 | Apr. 28, 2017 | Aug. 31, 2017 | Jul. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Short-term Debt [Line Items] |  |  |  |  |  |  |
Total debt |  |  |  |  |  | $ 516,000 | $ 3,416,000
Conversion of debt into stock | $ 1,900,000 |  |  |  |  | 3,191,000 |
Conversion of debt into stock (in shares) | 1,814,754 |  |  |  |  |  |
Proceeds from convertible notes |  |  |  |  |  | $ 3,850,000 | 1,365,000
Common Stock |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |
Conversion of debt into stock (in shares) |  | 1,414,700 |  |  |  | 3,787,300 |
Bridge Loan |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |
Total debt |  |  | $ 2,436,551 |  |  |  |
Conversion of debt into stock |  |  | 900,000 | $ 900,000 | $ 900,000 |  |
Accrued interest |  |  | 36,551 |  |  |  |
Debt instrument, face amount |  |  | $ 2,000,000 |  |  |  |
Bridge Loan | Common Stock |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |
Conversion of debt into stock (in shares) |  |  | 359,999 | 359,999 | 359,999 |  |
Bridge Loan | Convertible Bridge Loan |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |
Total debt |  |  |  |  |  |  | $ 695,000
Interest rate (as a percent) |  |  |  |  |  |  | 14.00%
Bridge Loan | Convertible Bridge Loan | Common Stock |  |  |  |  |  |  |
Short-term Debt [Line Items] |  |  |  |  |  |  |
Conversion of debt into stock |  | $ 695,000 |  |  |  |  |
Accrued interest |  | $ 192,000 |  |  |  |  |
Conversion of debt into stock (in shares) |  | 155,639 |  |  |  |  |

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