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3. Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Property Plant And Equipment Details    
Land $ 2,747 $ 2,713
Plant and Buildings 82,652 81,755
Furniture and fixtures 1,003 572
Machinery and equipment 3,972 4,308
Construction in progress 941 88
GAFI property, plant & equipment 15,408 0
Total gross property, plant & equipment 106,723 89,436
Less accumulated depreciation (27,886) (23,066)
Total net property, plant & equipment $ 78,837 $ 66,370