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NOTE 4 - PROPERTY, PLANT AND EQUIPMENT, NET (Tables)
12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Property, plant and equipment, net
   

December 31,

2020

   

December 31,

2019

 
 (in thousands)            
 Leasehold improvements   $ 421     $ 395  
 Equipment     5,625       5,606  
 Sales demonstration equipment     963       778  
      7,009       6,779  
 Less accumulated depreciation     5,793       5,111  
 Property and equipment, net   $ 1,216     $ 1,668