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Inventories (Tables)
3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Summary of Inventories
Inventories were as follows (in thousands):
                 
 
March 31, 2020
   
December 31, 2019
 
Raw materials
  $
 38,758
    $
 35,901
 
Work-in-process
   
7,705
     
5,184
 
Finished goods
   
6,889
     
8,102
 
                 
Net balance
  $
 53,352
    $
 49,187