Quarterly report pursuant to Section 13 or 15(d)

PLANT, PIPELINE AND EQUIPMENT (Details)

v3.7.0.1
PLANT, PIPELINE AND EQUIPMENT (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment $ 222,176   $ 222,176   $ 194,486
Less accumulated depreciation (58,994)   (58,994)   (54,477)
Net plant, pipeline and equipment 163,182   163,182   140,009
Interest capitalized for construction 287 $ 41 660 $ 72  
Amortization relating to the platinum catalyst 0 $ 25 25 $ 47  
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 5,386   5,386   5,376
Plant, Pipeline and Equipment [Member]          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment 168,640   168,640   154,107
Construction in Progress [Member]          
Property, Plant and Equipment [Line Items]          
Total plant, pipeline and equipment $ 46,538   $ 46,538   $ 33,391