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Property, plant and equipment (Tables)
 9 Months Ended
Sep. 30, 2014
Summary of Property, Plant and Equipment

Property, plant and equipment at September 30, 2014 and December 31, 2013 consists of the following:

 

     September 30,
2014		     December 31,
2013		  

Land

    $ 2,458      $ 2,458   

Buildings and improvements

      14,356        14,167   

Machinery and equipment

      106,559        94,184   

Office furniture, fixtures and equipment

      4,844        9,717   

Automotive equipment

      375        278   

Construction in progress

      3,624        10,615   
  

 

 

    

 

 

  
     132,216        131,419   

Less accumulated depreciation

      (81,002 )      (78,951 ) 
  

 

 

    

 

 

  
   $ 51,214      $ 52,468