Annual report pursuant to Section 13 and 15(d)

PLANT, PIPELINE AND EQUIPMENT (Details)

v3.22.0.1
PLANT, PIPELINE AND EQUIPMENT (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment $ 301,224 $ 287,904  
Less accumulated depreciation (115,703) (100,800)  
Net plant, pipeline and equipment 185,521 187,104  
Capitalized labor costs 600 600 $ 0
Platinum catalyst      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment 1,478 1,580  
Catalyst      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment 4,325 4,325  
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 282,780 270,149  
Construction in progress      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment $ 7,213 $ 6,422