Quarterly report pursuant to Section 13 or 15(d)

PLANT, PIPELINE AND EQUIPMENT (Details)

v3.7.0.1
PLANT, PIPELINE AND EQUIPMENT (Details) - USD ($)
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment $ 208,223,000   $ 194,486,000
Less accumulated depreciation (56,617,000)   (54,477,000)
Net plant, pipeline and equipment 151,606,000   140,009,000
Interest capitalized for construction 373,808 $ 31,000  
Amortization relating to the platinum catalyst 25,000 $ 21,000  
Platinum Catalyst Metal [Member]      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment 1,612,000   1,612,000
Land [Member]      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment 5,376,000   5,376,000
Plant, Pipeline and Equipment [Member]      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment 156,142,000   154,107,000
Construction in Progress [Member]      
Property, Plant and Equipment [Line Items]      
Total plant, pipeline and equipment $ 45,093,000   $ 33,391,000