Quarterly report pursuant to Section 13 or 15(d)

PLANT, PIPELINE AND EQUIPMENT (Details)

v3.19.2
PLANT, PIPELINE AND EQUIPMENT (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment $ 272,856   $ 272,856   $ 268,419
Less accumulated depreciation (81,328)   (81,328)   (73,762)
Net plant, pipeline and equipment 191,528   191,528   194,657
Interest capitalized for construction 0 $ 400 0 $ 700  
Capitalized labor costs 0 900 100 2,100  
Amortization relating to the platinum catalyst 200 $ 0 500 $ 0  
Platinum catalyst metal          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment 1,580   1,580   1,612
Catalyst          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment 3,974   3,974   3,131
Land          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment 5,428   5,428   5,428
Plant, pipeline and equipment          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment 257,986   257,986   253,905
Construction in progress          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment $ 3,888   $ 3,888   $ 4,343