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INVENTORY (Tables)
 9 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Summary of Components of Inventory The following table summarizes the components of the Company’s inventory for the period indicated:

 

 

 

As of

September 30,

2019

 

 

As of

December 31,

2018

 

 

 

(in thousands)

 

Raw materials

 

$

74,077

 

 

$

71,313

 

Work in progress

 

 

90,489

 

 

 

47,279

 

Finished goods

 

 

1,794

 

 

 

6,853

 

Total inventory

 

$

166,360

 

 

$

125,445