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INVENTORIES (Tables)
6 Months Ended
Jun. 30, 2021
INVENTORIES  
Schedule of inventories

    

June 30, 

    

December 31, 

(in thousands)

 

2021

2020

Raw materials and supplies

$

29,523

$

21,754

Work in process

 

14,351

 

11,378

Finished goods

 

13,235

 

9,178

Total inventories

$

57,109

$

42,310