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Property, plant and equipment (Tables)
3 Months Ended
Mar. 31, 2015
Summary of Property, Plant and Equipment

Property, plant and equipment at March 31, 2015 and December 31, 2014 consists of the following:

 

     March 31,
2015
     December 31,
2014
 

Land

   $ 2,458       $ 2,458   

Buildings and improvements

     14,385         14,380   

Machinery and equipment

     108,286         107,899   

Office furniture, fixtures and equipment

     4,542         4,698   

Automotive equipment

     374         374   

Construction in progress

     4,548         3,432   
  

 

 

    

 

 

 
  134,593      133,241   

Less accumulated depreciation

  (85,406   (83,215
  

 

 

    

 

 

 
$ 49,187    $ 50,026