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INCOME TAXES (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Deferred Tax Asset: |  |
Net operating loss carryforward | $ 51,449 | $ 46,051
Research and development credit carryforwards | 918 | 918
Other | 585 | 539
Deferred Tax Assets, Gross | 52,952 | 47,508
Less valuation allowance | (52,902) | (47,406)
Deferred Tax Asset | 50 | 102
Deferred Tax Liability: |  |
Property and equipment | 50 | 102
Deferred Tax Liability | 50 | 102
Net Deferred Asset (Liability) | $ 0 | $ 0

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