STOCKHOLDERS' EQUITY (Series C Warrants) (Details) - USD ($)	1 Months Ended		3 Months Ended		9 Months Ended
	Apr. 30, 2018	Feb. 28, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Nov. 30, 2017
Class of Stock [Line Items]
Underlying shares (in shares)			909,189		909,189
Warrants exercised					20,000
Series C Warrants [Member]
Class of Stock [Line Items]
Underlying shares (in shares)							130,857
Exercise price (in dollars per share)							$ 24.45
Warrants and Rights Outstanding, 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 Inducement Agreement
Class of Stock [Line Items]
Deemed dividend						$ 3,848,000
2018 Purchase Agreement | Deemed Dividend J
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)		$ 15.60	$ 11.25		$ 11.25
2018 Purchase Agreement | Series C Warrants [Member] | Deemed Dividend J
Class of Stock [Line Items]
Deemed dividend		$ 58,000
2018 Note Agreement
Class of Stock [Line Items]
Exercise price (in dollars per share)	$ 4.50
2018 Note Agreement | Deemed Dividend O
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)	$ 4.50
Warrants exercised			0	34,487	25,037	105,820
Proceeds from issuance of warrants			$ 0	$ 155,000	$ 56,000	$ 476,000
Intrinsic value of warrants exercised in period					$ 43,000	$ 294,000
2018 Note Agreement | Series C Warrants [Member] | Deemed Dividend O
Class of Stock [Line Items]
Deemed dividend	$ 45,000