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Inventories
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Inventories

(9) Inventories

 

Inventories consist of the following:

 

    June 30,
2019
    December 31,
2018
 
             
Raw materials   $ 1,118     $ 1,086  
Finished goods     1,041       1,243  
      2,159       2,329  
Allowance for excess inventory quantities     (66 )     (87 )
    $ 2,093     $ 2,242