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Property, Plant and Equipment, Net
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net
Note 5. Property, Plant and Equipment, Net

The components of our property, plant and equipment are summarized below (in thousands):
 
 
As of December 31,
 
 
2012
 
2011
 
Property, plant and equipment:
   
Building
$28,089
$19,997
Machinery and equipment
37,334
32,242
Leasehold improvements
3,578
2,330
Construction in progress
3,946
 
11,574
 
 
72,947
66,143
Less: accumulated depreciation and amortization
(35,712)
 
(31,861)
 
 
$37,235
 
$34,282
 
 
Depreciation and amortization expense was $3.9 million, $3.4 million, and $2.9 million for the years ended 2012, 2011, and 2010, respectively.