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Inventories (Tables)
3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of the following: 
 
March 31, 2020
 
December 31, 2019
Raw materials
$
58,367

 
$
57,742

Work in process
13,629

 
12,612

Finished goods
12,463

 
12,518

 
$
84,459

 
$
82,872