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Inventories (Tables)
3 Months Ended
Mar. 31, 2019
Inventory, Gross [Abstract]  
Components of Inventories
 
March 31, 2019
 
December 31, 2018
Raw materials and supplies
$
959

 
$
937

Work in process
167

 
144

Finished goods
725

 
609

 
$
1,851

 
$
1,690