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2. LIQUIDITY AND MANAGEMENT PLANS (Details Narrative) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]        
Cash and cash equivalents $ 14,547 $ 17,369 $ 23,812 $ 26,718
Working capital 14,200      
Accumulated deficit $ (112,157) $ (109,065)