Annual report pursuant to Section 13 and 15(d)

PLANT, PIPELINE AND EQUIPMENT (Details)

v3.19.1
PLANT, PIPELINE AND EQUIPMENT (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment $ 268,419 $ 245,761  
Less accumulated depreciation (73,762) (63,240)  
PLANT, PIPELINE, AND EQUIPMENT, NET 194,657 182,521  
Interest capitalized for construction 731 937 $ 450
Capitalized labor costs 2,307 4,344 2,889
Amortization included in cost of sales 59 25 $ 98
Platinum catalyst      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment 1,612 1,612  
Catalyst      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment 3,131 779  
Land      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment 5,428 5,428  
Plant, pipeline and equipment      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment 253,905 186,946  
Construction in progress      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment $ 4,343 $ 50,996