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6. Property, Plant and Equipment
6 Months Ended
Jun. 30, 2014
Property, Plant and Equipment [Abstract]  
6. Property, Plant and Equipment

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

 

   June 30, 2014   December 31, 2013 
Land improvements  $103   $103 
Building and improvements   16,112    16,016 
Machinery and equipment   48,301    37,490 
Furniture and fixtures   1,373    1,047 
Computer equipment and software   4,080    3,563 
Transportation equipment   187    188 
    70,156    58,407 
Less accumulated depreciation and amortization   (29,733)   (28,145)
    40,423    30,262 
Construction in progress   133    139 
Land   1,101    733 
Property, plant and equipment, net  $41,657   $31,134 

 

For the three and six months ended June 30, 2014, depreciation expense of property, plant and equipment was $1.3 million and $2.5 million, respectively.