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Liquidity (Details Narrative) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Working capital	$ 4,100
Accumulated deficit	125,429		$ 125,185
Net loss	244	$ 740
Cash and cash equivalents	$ 2,095	$ 2,164	$ 3,277	$ 2,518

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