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Inventories (Tables)
12 Months Ended
Dec. 31, 2021
Inventories  
Schedule of inventory

December 31, 

    

2021

    

2020

(in thousands)

  

  

Raw materials and supplies

$

77,709

$

81,403

Finished goods

 

1,274

 

1,515

Total Inventory

$

78,983

$

82,918