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3. Property, Plant and Equipment
 3 Months Ended
Mar. 31, 2017
Property, Plant and Equipment [Abstract]  
3. Property, Plant and Equipment

 

Property, plant and equipment consist of the following:

 

   

March 31,

2017  

    

December 31,

2016  

  
Land   $ 2,738     $ 2,713  
Plant and buildings     82,282       81,755  
Furniture and fixtures     603       572  
Machinery and equipment     4,353       4,308  
Construction in progress     104       88  
Total gross property, plant & equipment     90,080       89,436  
Less accumulated depreciation     (24,410 )     (23,066 )
Total net property, plant & equipment   $ 65,670     $ 66,370  

 

Depreciation on the components of property, plant and equipment is calculated using the straight-line method 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 March 31, 2017 and March 31, 2016, the Company recorded depreciation expense of $1.1 million and $1.2 million, respectively.

 

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 on the long-lived assets during the three months ended March 31, 2017.