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Inventory (Tables)
 9 Months Ended
Sep. 30, 2017
Inventory Disclosure [Abstract]  
Inventory

Inventory consisted of the following at September 30, 2017 and December 31, 2016 (in thousands):

 

September 30,

 

 

December 31,

 

  

2017

 

 

2016

 

Finished goods

$

1,332

 

 

$

—

 

Work-in-process

 

3,910

 

 

 

1,803

 

Raw materials and supplies

 

35,430

 

 

 

18,388

 

Inventory

$

40,672

 

 

$

20,191