ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Narrative) (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended		12 Months Ended
	Mar. 12, 2018	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Jan. 29, 2019	Jan. 15, 2019
Reduction in Certain Accrued Expense and Accounts Payable		$ 0	$ 100		$ 1,300	$ 200
Common stock warrant liabilities		$ 1,773			1,773		$ 1,132
Gain in warrant revaluation				$ 200
Gain (loss) on settlement of equity instruments			$ 66		1,251	213
Proceeds from convertible notes					$ 2,150	3,000
Liability related to equity purchase agreement							460
Other current liabilities
Liability related to equity purchase agreement							500
Crede Note
Warrants, fair value	$ 400
Gain (loss) on settlement of equity instruments						$ (400)
Issuance of convertible notes									$ 1,450
Settled Litigation | Crede Note
Litigation Settlement, Amount Awarded to Other Party	$ 1,925
Liability For Settlement Payment Period					16 months
Damages paid							$ 500
Settled Litigation | Leviston Resources LLC
Issuance of convertible notes								$ 700
Settled Litigation | Leviston Resources LLC | Crede Note | Accrued expenses
Issuance of convertible notes								$ 200