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3. Property, Plant and Equipment (Tables)
 6 Months Ended
Jun. 30, 2018
Statement of Operations Data  
Schedule of Property, plant and equipment
   

June 30,

2018

    

December 31,

2017

  
Land   $ 2,709     $ 2,747  
Plant and buildings     82,642       82,652  
Furniture and fixtures     1,039       1,003  
Machinery and equipment     3,909       3,972  
Construction in progress     1,837       941  
GAFI property, plant & equipment     15,408       15,408  
Total gross property, plant & equipment     107,544       106,723  
Less accumulated depreciation     (29,841 )     (27,886 )
Total net property, plant & equipment   $ 77,703     $ 78,837  
Depreciation of property, plant, and equipment
    Years  
Plant and Buildings     20 - 30  
Machinery & Equipment     5 - 7  
Furniture & Fixtures     3 - 5