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NOTE 3 - PROPERTY, PLANT AND EQUIPMENT, NET (Tables)
9 Months Ended
Sep. 30, 2019
Property, Plant and Equipment [Abstract]  
Property, plant, and equipment, net
   

September 30,

2019

   

December 31,

2018

 
 (in thousands)            
 Leasehold improvements   $ 387     $ 399  
 Equipment     5,513       5,378  
 Sales demonstration equipment     929       942  
      6,829       6,719  
 Less accumulated depreciation     5,096       4,734  
 Property and equipment, net   $ 1,733     $ 1,985