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INVENTORIES (Tables)
12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories include the following at December 31:
20212020
(thousands of dollars)
Raw material$2,348 $2,580 
Work in process212 138 
Finished products18,574 10,227 
Total inventory$21,134 $12,945