Quarterly report pursuant to Section 13 or 15(d)

INVENTORIES

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INVENTORIES
3 Months Ended
Mar. 31, 2018
INVENTORIES [Abstract]  
INVENTORIES
5. INVENTORIES

Inventories included the following:

   
March 31, 2018
   
December 31, 2017
 
   
(thousands of dollars)
 
Raw material
 
$
2,612
   
$
3,703
 
Work in process
   
51
     
27
 
Finished products
   
13,028
     
14,720
 
    Total inventory
 
$
15,691
   
$
18,450
 

Inventory serves as collateral for our amended and restated credit agreement.  See Note 10.

Inventory included petrochemical products in transit valued at approximately $4.0 million and $3.7 million at March 31, 2018, and December 31, 2017, respectively.