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NOTE 3 - PROPERTY, PLANT AND EQUIPMENT, NET (Details) (in thousands) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Abstract]    
Leasehold improvements $ 407 $ 399
Equipment 5,443 5,378
Sale demonstration equipment 994 942
Property and equipment gross 6,844 6,719
Less accumulated depreciation 4,875 4,734
Property and equipment, net $ 1,969 $ 1,985