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3. Property, Plant and Equipment
9 Months Ended
Sep. 30, 2018
Property, Plant and Equipment [Abstract]  
3. Property, Plant and Equipment

Property, plant and equipment consist of the following:

 

   

September 30,

2018

   

December 31,

2017

 
Land   $ 2,680     $ 2,747  
Plant and buildings     81,974       82,652  
Furniture and fixtures     1,049       1,003  
Machinery and equipment     3,860       3,972  
Construction in progress     2,545       941  
GAFI property, plant & equipment     15,408       15,408  
Total gross property, plant & equipment     107,516       106,723  
Less accumulated depreciation     (30,704 )     (27,886 )
Total net property, plant & equipment   $ 76,812     $ 78,837  

 

Depreciation on the components of property, plant and equipment is calculated using the straight-line method to allocate their depreciable amounts over their estimated useful lives as follows:

 

    Years
Plant and Buildings   20-30
Machinery & Equipment   5-7
Furniture & Fixtures   3-5

 

For the three months ended September 30, 2018 and 2017, the Company recorded depreciation expense of $1.2 million for each period. For the nine months ended September 30, 2018 and 2017, the Company recorded depreciation expense of $3.5 million for each period.

 

Management is required to evaluate these long-lived assets for impairment whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable. Management determined there was no impairment of long-lived assets during the three and nine months ended September 30, 2018 and 2017.