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Property, Plant and Equipment, Net (Tables)
 12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment, Net [Abstract]  
Components of property, plant and equipment

The components of our property, plant and equipment are summarized below (in thousands):

As of December 31,
2014
2013
Property, plant and equipment:
 
 
 
 
 
 
Building
$
30,469
 
$
30,369
 
Machinery and equipment
 
41,900
 
 
40,764
 
Leasehold improvements
 
5,070
 
 
4,493
 
Construction in progress
 
1,918
 
 
2,879
 
 
79,357
 
 
78,505
 
Less: accumulated depreciation and amortization
 
(45,495
)
 
(40,884
)
$
33,862
 
$
37,621