INCOME TAXES (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Asset:
Net operating loss carryforward	$ 60,276	$ 51,449
Research and development credit carryforwards	918	918
Other	116	585
Deferred Tax Assets, Gross	61,310	52,952
Less valuation allowance	(61,310)	(52,902)
Deferred Tax Asset	0	50
Deferred Tax Liability:
Property and equipment	0	50
Deferred Tax Liability	0	50
Net Deferred Asset (Liability)	$ 0	$ 0