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Inventories
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventories
(5) Inventories  

 

Inventories consist of the following:

 

    As of December 31,  
    2019     2018  
Raw materials   $ 1,425     $ 1,086  
Finished goods     1,170       1,243  
      2,595       2,329  
Allowance for excess quantities     (41 )     (87 )
    $ 2,554     $ 2,242