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Inventories (Tables)
6 Months Ended
Jun. 30, 2019
Inventories [Abstract]  
Inventories
Inventories consist of:
 
  
June 30, 2019
  
December 31, 2018
 
Raw materials and work in progress
 
$
3,200
  
$
2,442
 
Finished goods
  407
   
352
 
Total inventories
 
$
3,607
  
$
2,794