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Inventory (Tables)
 3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventories

Inventory is stated at the lower of cost and net realizable value. Cost is determined using the first-in, first-out method. Inventory consisted of the following:

 

 

 

March 31,

 

 

December 31,

 

(In thousands)

 

2019

 

 

2018

 

Raw materials

 

$

33,526

 

 

$

31,824

 

Work in process

 

 

41,548

 

 

 

38,019

 

Finished goods(1)

 

 

17,787

 

 

 

20,353

 

Total inventory

 

$

92,861

 

 

$

90,196

 

 

(1)

At March 31, 2019 and December 31, 2018, the Company had $11.7 million and $11.0 million, respectively, of finished goods inventory located at its third-party warehouse and shipping service provider.