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Inventory (Tables)
9 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Inventory

Inventory consisted of the following at September 30, 2019 and December 31, 2018 (in thousands):

 

 

 

 

 

 

 

 

  

September 30, 2019

 

 

December 31, 2018

 

Finished goods

$

62

 

 

$

347

 

Work-in-process

 

1,092

 

 

 

6,375

 

Raw materials and supplies

 

36,180

 

 

 

58,857

 

Inventory

$

37,334

 

 

$

65,579