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INVENTORIES (Tables)
3 Months Ended
Mar. 31, 2020
INVENTORIES  
Schedule of inventories

    

March 31, 

    

December 31, 

(in thousands)

2020

2019

Raw materials and supplies

$

28,276

$

24,993

Work in process

 

7,998

 

7,731

Finished goods

 

9,672

 

8,829

Total inventories

$

45,946

$

41,553