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Inventories
 6 Months Ended
Jun. 30, 2022
Inventory Disclosure [Abstract]  
Inventories INVENTORIES
Components of inventories as of June 30, 2022 and December 31, 2021 are as follows:
 June 30, 2022December 31, 2021
 (in thousands)
Finished goods$52,924 $59,925 
Raw materials2,872 2,827 
Parts and supplies5,048 4,713 
Work in progress1,760 1,633 
Total inventories
$62,604 $69,098 
Finished goods inventories include newly manufactured clear brine fluids as well as used brines that are repurchased from certain customers for recycling