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3. Property, Plant and Equipment (Tables)
 9 Months Ended
Sep. 30, 2017
Statement of Operations Data  
Schedule of Property, plant and equipment
   

September 30,

2017

    

December 31,

2016

  
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  
Depreciation of property, plant, and equipment
  Years
Plant and buildings   20 - 30
Machinery and equipment   5 - 7
Furniture and fixtures   3 - 5