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Inventories
 9 Months Ended
Sep. 30, 2022
Inventory Disclosure [Abstract]  
Inventories INVENTORIES
Components of inventories as of September 30, 2022 and December 31, 2021 are as follows:
 September 30, 2022December 31, 2021
 (in thousands)
Finished goods$60,069 $59,925 
Raw materials4,267 2,827 
Parts and supplies5,735 4,713 
Work in progress1,487 1,633 
Total inventories
$71,558 $69,098 
Finished goods inventories include newly manufactured clear brine fluids as well as used brines that are repurchased from certain customers for recycling