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CONVERTIBLE NOTES (Convertible Promissory Notes - Exchange Notes) (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended	6 Months Ended		12 Months Ended
	Feb. 12, 2019	Sep. 17, 2018	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2018	Feb. 28, 2018
Debt Instrument [Line Items]
Total debt			$ 326	$ 326			$ 516
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			909,189	909,189
Original debt amount					$ 456
Conversion of convertible debt plus interest into common stock	$ 1,900
Number of shares converted from debt instrument (in shares)	120,983
Creditor Warrants Relating to Secured Debt [Member]
Debt Instrument [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights						7,207		7,207
Class of Warrant or Right, Exercise Price of Warrants or Rights								$ 112.50
Senior Secured Convertible Promissory Notes
Debt Instrument [Line Items]
Debt instrument, term		18 months
Conversion of convertible debt plus interest into common stock		$ 2,800
Settlement Agreements
Debt Instrument [Line Items]
Total debt						$ 3,200
Warrants and Rights Outstanding						1,900
Secured Debt [Member]
Debt Instrument [Line Items]
Original debt amount		$ 3,200
Debt Restructured						6,300
Convertible Debt [Member] | Convertible promissory notes - Exchange Notes
Debt Instrument [Line Items]
Conversion of convertible debt plus interest into common stock			$ 0	$ 600		$ 2,800
Number of shares converted from debt instrument (in shares)			0	155,351		446,913

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