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Inventories (Tables)
9 Months Ended
Sep. 30, 2018
Inventory Disclosure [Abstract]  
Schedule of inventories

Inventories consist of the following:

 

  September 30, 2018   December 31, 2017
         
Raw materials   $ 1,086     $ 543  
Finished goods     1,026       863  
      2,112       1,406  
Allowance for excess inventory quantities     (21 )     (21 )
    $ 2,091     $ 1,385