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INVENTORIES (Tables)
3 Months Ended
Mar. 31, 2022
INVENTORIES  
Schedule of inventories

    

March 31, 

    

December 31, 

    

 

2022

2021

 

(in thousands)

Raw materials and supplies

$

33,255

$

42,231

Work in process

 

18,621

 

14,390

Finished goods

 

26,303

 

16,640

Total inventories

$

78,179

$

73,261