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Inventory (Tables)
 6 Months Ended
Jun. 30, 2021
Inventory Disclosure [Abstract]  
Inventory

Inventory consisted of the following at June 30, 2021 and December 31, 2020 (in thousands):

 

 

 

 

 

 

 

 

 

  

June 30, 2021

 

 

December 31, 2020

 

Finished goods

$

315

 

 

$

600

 

Work-in-process

 

424

 

 

 

802

 

Raw materials and supplies

 

33,024

 

 

 

31,683

 

Inventory

$

33,763

 

 

$

33,085