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, 2018	Dec. 31, 2017	Jun. 29, 2017
Class of Stock [Line Items]
Underlying shares (in shares)					13,763,608
Warrants, fair value							$ 211,000
Deemed dividend					$ 4,222,000	$ 12,431,000
Warrants exercised					300,000
Series C Warrants [Member]
Class of Stock [Line Items]
Underlying shares (in shares)				1,962,857
Exercise price (in dollars per share)				$ 1.63
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 | Series C Warrants [Member]
Class of Stock [Line Items]
Exercise price (in dollars per share)			$ 1.04		$ 0.75
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)	$ 0.15	$ 0.30
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)	$ 0.15	$ 0.30
Warrants exercised					1,587,300
Proceeds from issuance of warrants					$ 476,000
Intrinsic value of warrants exercised in period					$ 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