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6. Property, Plant and Equipment
9 Months Ended
Sep. 30, 2013
Property, Plant and Equipment [Abstract]  
6. Property, Plant and Equipment

Property, plant and equipment consisted of the following for the periods indicated (in thousands):

 

   September 30, 2013   December 31, 2012 
Land improvements  $96   $93 
Building and improvements   15,560    15,239 
Machinery and equipment   33,690    29,977 
Furniture and fixtures   853    739 
Computer equipment and software   3,183    2,851 
Transportation equipment   188    173 
    53,570    49,072 
Less accumulated depreciation and amortization   (27,178)   (24,967)
    26,392    24,105 
Land   733    733 
Property, plant and equipment, net  $27,125   $24,838 

 

For the three and nine months ended September 30, 2013, depreciation expense of property, plant and equipment was $0.9 million and $2.4 million, respectively.