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Inventories
3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Inventories

(9) Inventories

 

Inventories consist of the following:

 

   March 31, 2019   December 31, 2018 
Raw materials  $1,250   $1,086 
Finished goods   1,057    1,243 
    2,307    2,329 
Allowance for excess inventory quantities   (79)   (87)
   $2,228   $2,242