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INVENTORIES
9 Months Ended
Sep. 30, 2021
INVENTORIES  
INVENTORIES

8.    INVENTORIES

Inventories consist of the following:

    

September 30, 

    

December 31, 

(in thousands)

 

2021

2020

Raw materials and supplies

$

43,335

$

21,754

Work in process

 

16,871

 

11,378

Finished goods

 

16,541

 

9,178

Total inventories

$

76,747

$

42,310