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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Summary of Inventories
Inventories were as follows (in thousands):
 
    
June 30, 2020
 
  
December 31, 2019
 
Raw materials
   $ 40,745    $ 35,901
Work-in-process
     8,139      5,184
Finished goods
     6,746      8,102
  
 
 
    
 
 
 
Net balance
   $ 55,630    $ 49,187