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3. Property, Plant and Equipment (Tables)
 9 Months Ended
Sep. 30, 2019
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
   

September 30,

2019

    

December 31,

2018

  
Land   $ 4,108     $ 4,116  
Plant and buildings     83,244       82,445  
Furniture and fixtures     1,093       1,056  
Machinery and equipment     4,207       3,928  
Construction in progress     8,076       3,581  
GAFI property, plant & equipment     15,408       15,408  
Total gross property, plant & equipment     116,136       110,534  
Less accumulated depreciation     (35,293 )     (32,042 )
Total net property, plant & equipment   $ 80,843     $ 78,492  
Depreciation of property, plant, and equipment
  Years
Plant and Buildings 20-30
Machinery & Equipment 5-7
Furniture & Fixtures 3-5