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Inventory (Tables)
6 Months Ended
Jun. 30, 2021
Inventory  
Schedule of Inventory Inventory as of June 30, 2021 and December 31, 2020 consisted of the following (in thousands):

    

June 30,

    

December 31,

 

2021

2020

Raw materials and supplies - production locations

$

131,932

$

92,221

Raw materials and supplies - customer locations

14,096

12,405

Work-in-process

 

58,147

 

29,349

Finished goods

 

5,645

 

5,411

Inventory

$

209,820

$

139,386