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Inventories (Tables)
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Schedule of inventories Inventories consist of the following:

 

    As of December 31,  
    2018     2017  
Raw materials   $ 1,086     $ 543  
Finished goods     1,243       863  
      2,329       1,406  
Allowance for excess quantities     (87 )     (21 )
    $ 2,242     $ 1,385