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Inventories
6 Months Ended
Jun. 30, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories

Inventories consist of the following:
 
June 30,
2018
 
December 31,
2017
Raw materials
$
41,538

 
$
41,844

Work-in-process
16,134

 
14,666

Finished goods
85,733

 
84,926

Total
$
143,405

 
$
141,436