ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Narrative) (Details) - USD ($) $ in Thousands			12 Months Ended
	Jan. 15, 2019	Mar. 12, 2018	Dec. 31, 2018	Dec. 31, 2017	Jan. 29, 2019	Feb. 12, 2018	Jun. 29, 2017
Reduction in Certain Accrued Expense and Accounts Payable			$ 300	$ 1,100
Settlement liability				1,100
Common stock warrant liabilities			1,132	841
Warrants, fair value							$ 211
Gain in warrant revaluation			200
Gain (loss) on settlement of equity instrments			263	877
Proceeds from issuance of convertible notes			3,850	1,365
Liability related to equity purchase agreement			460
Other current liabilities
Liability related to equity purchase agreement			500
Crede
Liability For Settlement Common Shares Issued						1,814,754
Liability For Settlement Fair Value Of Common Shares Issued						$ 1,900
Loss Contingency, Damages Sought, Value			2,200
Settlement liability			1,500
Common stock warrant liabilities			400	$ 600
Warrants, fair value			400
Gain (loss) on settlement of equity instrments			$ (400)
Subsequent Events | Crede
Issuance of convertible notes	$ 1,450
Subsequent Events | Crede | Minimum
Proceeds from issuance of convertible notes	4,000
Settled Litigation | Crede
Litigation Settlement, Amount Awarded to Other Party		$ 1,925
Liability For Settlement Payment Period			16 months
Settlement payable			$ 400
Damages paid			$ 500
Settled Litigation | Subsequent Events | Crede
Issuance of convertible notes	$ 1,450
Settled Litigation | Subsequent Events | Leviston Resources LLC
Issuance of convertible notes					$ 700
Settled Litigation | Subsequent Events | Leviston Resources LLC | Crede
Issuance of convertible notes					700
Settled Litigation | Subsequent Events | Leviston Resources LLC | Crede | Accrued expenses
Issuance of convertible notes					$ 200