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Inventories (Tables)
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of the following (in thousands):
  
December 31,
 
2019
 
2018
Raw materials
$
27,285

 
$
42,738

Work-in-process
5,503

 
3,435

Finished goods
27,473

 
37,109

 
$
60,261

 
$
83,282