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NOTE 4 - PROPERTY, PLANT AND EQUIPMENT, NET (Tables)
12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
Property, plant and equipment, net
   

December 31,

2019

   

December 31,

2018

 
 (in thousands)            
 Leasehold improvements   $ 395     $ 399  
 Equipment     5,606       5,378  
 Sales demonstration equipment     778       942  
      6,779       6,719  
 Less accumulated depreciation     5,111       4,734  
 Property and equipment, net   $ 1,668     $ 1,985