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INVENTORIES (Tables)
9 Months Ended
Sep. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventories included the following:
 September 30, 2020December 31, 2019
 (thousands of dollars)
Raw material$2,543 $2,100 
Work in process122 142 
Finished products8,445 11,382 
Total inventory$11,110 $13,624