Quarterly report pursuant to Section 13 or 15(d)

PLANT, PIPELINE AND EQUIPMENT (Details)

v3.20.1
PLANT, PIPELINE AND EQUIPMENT (Details) - USD ($)
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment $ 276,798,000   $ 274,806,000
Less accumulated depreciation (89,587,000)   (85,887,000)
Net plant, pipeline and equipment 187,211,000   188,919,000
Capitalized labor costs 0 $ 100,000  
Amortization relating to the platinum catalyst 200,000 $ 0  
Platinum catalyst metal      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment 1,580,000   1,580,000
Catalyst      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment 4,225,000   4,095,000
Land      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment 5,428,000   5,428,000
Plant, pipeline and equipment      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment 260,892,000   258,651,000
Construction in progress      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment $ 4,673,000   $ 5,052,000