INCOME TAXES (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Tax Credit Carryforward [Line Items]
Accruals and reserves	$ 0	$ 1
Valuation allowance	0	(1)
Total current	0	0
NOL, AMT and general business credit carryforwards	37,557	56,600
Other	157	123
Valuation allowance	(37,714)	(56,723)
Total non current	0	0
Total deferred income taxes	$ 0	$ 0