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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of inventories
   December 31 
   2020   2019 
         
Raw materials  $116   $120 
Inventory in progress   1,299    1,285 
Finished goods   4,389    4,906 
Net – advances from customers   (933)   (904)
           
   $4,871   $5,407