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Note 8 - Property, Plant and Equipment, Net - Property, Plant and Equipment, Net (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Refinery and facilities $ 72,675 $ 72,675
Land 566 566
Other property and equipment 913 913
Property, Plant and Equipment, Gross, Excluding Construction in Progress 74,154 74,154
Less: Accumulated depreciation and amortiation (23,608) (22,966)
Property, Plant and Equipment, Net, Excluding Construction in Progress 50,546 51,188
Construction in progress 3,770 3,770
Property, Plant and Equipment, Net $ 54,316 $ 54,958