Quarterly report pursuant to Section 13 or 15(d)

PLANT, PIPELINE AND EQUIPMENT (Details)

v3.10.0.1
PLANT, PIPELINE AND EQUIPMENT (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment $ 260,416   $ 260,416   $ 244,982
Less accumulated depreciation (68,332)   (68,332)   (63,240)
Net plant, pipeline and equipment 192,084   192,084   181,742
Interest capitalized for construction 427 $ 287 731 $ 660  
Capitalized labor costs 900 900 2,100 1,600  
Amortization relating to the platinum catalyst 0 $ 0 0 $ 25  
Platinum Catalyst Metal [Member]          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment 1,612   1,612   1,612
Land [Member]          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment 5,428   5,428   5,428
Plant, Pipeline and Equipment [Member]          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment 189,866   189,866   186,946
Construction in Progress [Member]          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment $ 63,510   $ 63,510   $ 50,996