Quarterly report pursuant to Section 13 or 15(d)

PLANT, PIPELINE AND EQUIPMENT (Details)

v3.20.2
PLANT, PIPELINE AND EQUIPMENT (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment $ 282,531   $ 282,531   $ 274,806
Less accumulated depreciation (93,294)   (93,294)   (85,887)
Net plant, pipeline and equipment 189,237   189,237   188,919
Amortization relating to the platinum catalyst 200 $ 200 400 $ 500  
Platinum catalyst metal          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment 1,580   1,580   1,580
Catalyst          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment 4,325   4,325   4,095
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 264,839   264,839   258,651
Construction in progress          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment $ 6,359   $ 6,359   $ 5,052