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3. Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Schedule of warrant activity    
Land $ 2,734 $ 2,713
Plant and Buildings 82,390 81,755
Furniture and fixtures 983 572
Machinery and equipment 3,951 4,308
Construction in progress 522 88
GAFI property, plant & equipment 15,431 0
Total gross property, plant & equipment 106,011 89,436
Less accumulated depreciation (26,651) (23,066)
Total net property, plant & equipment $ 79,360 $ 66,370