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Inventories (Tables)
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Schedule of inventories
   December 31 
   2019   2018 
         
Raw materials  $120   $83 
Inventory in progress   1,285    - 
Finished goods   4,906    2,791 
Net – advances from customers   (904)   - 
           
   $5,407   $2,874