Note 3 - Balance Sheet Detail - Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, plant and equipment, gross	$ 11,782	$ 10,799
Less: Accumulated depreciation	(8,965)	(8,127)
Property and equipment, net	2,817	2,672
Leasehold Improvements [Member]
Property, plant and equipment, gross	867	660
Equipment and Furniture [Member]
Property, plant and equipment, gross	3,110	2,835
Machinery and Equipment [Member]
Property, plant and equipment, gross	$ 7,805	$ 7,304

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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