STOCKHOLDERS' EQUITY (Remaining Warrants) (Details) - USD ($)		1 Months Ended		3 Months Ended			9 Months Ended
	Apr. 20, 2018	Sep. 30, 2018	Apr. 30, 2018	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	May 31, 2019	Apr. 30, 2019	Feb. 28, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Class of warrant, number of securities called by warrants				909,189			909,189
Loss on modification of warrants						$ (143,000)	$ (1,128,000)	$ (143,000)
Warrants exercised							20,000
Change in fair value due to repricing							$ 19,000	$ (617,000)
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)			243,224			196,334
Exercise price (in dollars per share)		$ 7.50	$ 11.25			$ 7.50		$ 7.50
Warrants, fair value			$ 1,100,000
Loss on modification of warrants				$ 0
Warrants exercised				0			51,708
Proceeds from issuance of warrants				$ 0			$ 279,000
Intrinsic value of warrants exercisable				128,000			128,000
Change in fair value due to repricing		$ 100,000
April 2018 Warrants, First Half
Class of Stock [Line Items]
Class of warrant or right, term	5 years		5 years			5 years
Amended Warrants
Class of Stock [Line Items]
Exercise price (in dollars per share)										$ 5.40
Warrants term										5 years
Loss on modification of warrants							1,100,000
Amended April 2018 Warrants
Class of Stock [Line Items]
Exercise price (in dollars per share)										$ 5.40
Warrants term										5 years
Loss on modification of warrants							700,000
Amended Q3 2018 Warrants [Member]
Class of Stock [Line Items]
Loss on modification of warrants				$ 0			$ 400,000
April 2018 Warrants, Second Half
Class of Stock [Line Items]
Class of warrant or right, term	1 year		1 year			1 year
Warrants 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)						196,340
Exercise price (in dollars per share)		$ 11.25				$ 11.25		11.25		$ 5.40
Warrants term										5 years
Warrants exercised				0			53,610
Proceeds from issuance of warrants				$ 0			$ 289,000
Intrinsic value of warrants exercisable				$ 133,382			$ 133,382
Quarter 3 2018 Warrants | Convertible Debt [Member]
Class of Stock [Line Items]
Number of Warrants issued						196,340
Exercise price (in dollars per share)		$ 11.25				$ 11.25		$ 11.25
Warrants, fair value		$ 700,000				$ 700,000		$ 700,000
Change in fair value due to repricing						$ 100,000		$ 100,000
Modified exercise price		$ 7.50
Quarter 3 2018 Warrants, First Half [Member] | Convertible Debt [Member]
Class of Stock [Line Items]
Class of warrant or right, term						5 years
Quarter 3 2018 Warrants, Second Half [Member] | Convertible Debt [Member]
Class of Stock [Line Items]
Class of warrant or right, term						1 year
Warrants Not Assumed In Merger, Expiring November 2023 [Member]
Class of Stock [Line Items]
Class of warrant, number of securities called by warrants				75,788			75,788
Exercise price (in dollars per share)				$ 5.40			$ 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				51,282			51,282
Exercise price (in dollars per share)				$ 5.40			$ 5.40
Quarter 4 2018 Warrants
Class of Stock [Line Items]
Stock rights issued (in shares)					300,115
Warrants exercised				0			173,045
Proceeds from issuance of warrants				$ 0			$ 934,000
Intrinsic value of warrants exercisable				$ 489,000			$ 489,000
Quarter 4 2018 Warrants | Convertible Debt [Member]
Class of Stock [Line Items]
Class of warrant, number of securities called by warrants					300,115
Exercise price (in dollars per share)					$ 5.40
Warrants, fair value					$ 700,000
Warrants term					5 years
April 2019 Bridge Notes | Convertible Debt [Member]
Class of Stock [Line Items]
Class of warrant, number of securities called by warrants										147,472
Exercise price (in dollars per share)										$ 5.40
Warrants, fair value										$ 1,000,000
Warrants term										5 years
May 2019 Warrants | Convertible Debt [Member]
Class of Stock [Line Items]
Class of warrant, number of securities called by warrants									154,343
Exercise price (in dollars per share)									$ 5.40
Warrants, fair value									$ 900,000
Warrants term									5 years
2018 Note Agreement
Class of Stock [Line Items]
Exercise price (in dollars per share)			$ 4.50
2018 Note Agreement | Advisor Warrants
Class of Stock [Line Items]
Stock rights issued (in shares)			15,466
Exercise price (in dollars per share)			$ 11.25
Warrants, fair value			$ 100,000