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PLANT, PIPELINE AND EQUIPMENT (Tables)
6 Months Ended
Jun. 30, 2015
PLANT, PIPELINE AND EQUIPMENT [Abstract]  
Plant, Pipeline and Equipment
Plant, pipeline and equipment consisted of the following:

   
June 30, 2015
  
December 31, 2014
 
   
(thousands of dollars)
 
Platinum catalyst
 $1,612  $1,612 
Land
  4,577   4,577 
Plant, pipeline and equipment
  97,576   95,351 
Construction in progress
  26,025   11,590 
Total plant, pipeline and equipment
  129,790   113,130 
  Less accumulated depreciation
  (43,138)  (39,319)
Net plant, pipeline and equipment
 $86,652  $73,811