Note 4 - Balance Sheet Detail - Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, plant and equipment, gross	$ 9,287	$ 9,060
Less: Accumulated depreciation	(7,191)	(7,153)
Total Property and equipment, net	2,096	1,907
Leasehold Improvements [Member]
Property, plant and equipment, gross	640	652
Equipment and Furniture [Member]
Property, plant and equipment, gross	2,370	2,973
Machinery and Equipment [Member]
Property, plant and equipment, gross	$ 6,277	$ 5,435

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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