CONVERTIBLE NOTES (2017 New Bridge Notes II) (Details) - USD ($)		12 Months Ended
	Jun. 29, 2017	Dec. 31, 2018	Dec. 31, 2017	Aug. 31, 2017	Jun. 30, 2017	Apr. 28, 2017
Short-term Debt [Line Items]
Underlying shares (in shares)		13,763,608
Warrants, fair value	$ 211,000
Merger advisory fees			$ 2,676,000
Proceeds from equity financing		$ 7,000,000
Total debt		516,000	3,416,000
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		$ 62,000
Upon Execution
Short-term Debt [Line Items]
Underlying shares (in shares)		22,857
Performance Based
Short-term Debt [Line Items]
Underlying shares (in shares)		68,572
Side Warrants [Member]
Short-term Debt [Line Items]
Underlying shares (in shares)		91,429
Exercise price (in dollars per share)		$ 7.00
Class of warrant or right, term		5 years
Merger advisory fees			$ 487,000
Common Stock
Short-term Debt [Line Items]
Underlying shares (in shares)	45,600
Exercise price (in dollars per share)	$ 7.50
Common Stock | Side Warrants [Member]
Short-term Debt [Line Items]
Underlying shares (in shares)		0
Bridge Loan
Short-term Debt [Line Items]
Premium rate changed upon settlement of debt						20.00%
Total debt						$ 2,436,551
Bridge Loan | Common Stock
Short-term Debt [Line Items]
Conversion price (in dollars per share)						$ 2.50
Underlying shares (in shares)					45,600
Exercise price (in dollars per share)			$ 1.40	$ 3.00	$ 7.50
Bridge Loan | 2017 New Bridge Notes II
Short-term Debt [Line Items]
Sale of debt	$ 800,000
Proceeds from sale of debt instrument	$ 721,000
Interest rate (as a percent)	8.00%
Conversion price (in dollars per share)	$ 3.736329
Premium rate changed upon settlement of debt	20.00%
Premium on debt settlement	$ 160,000
Discount on debt	$ 656,000