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Property, Plant and Equipment, Net
 12 Months Ended
Dec. 31, 2016
Property, Plant and Equipment, Net  
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, 

 

 

    

2016

    

2015

 

Property, plant and equipment:

 

 

 

 

 

 

 

Machinery and equipment, at cost

 

$
41,254

 

$
40,899

 

Less: accumulated depreciation and amortization

 

 
(37,311)

 

 
(36,044)

 

Building, at cost

 

 
29,600

 

 
30,388

 

Less: accumulated depreciation and amortization

 

 
(9,654)

 

 
(9,170)

 

Leasehold improvements, at cost

 

 
4,942

 

 
5,059

 

Less: accumulated depreciation and amortization

 

 
(3,608)

 

 
(3,306)

 

Construction in progress

 

 
2,582

 

 
3,596

 

 

 

$
27,805

 

$
31,422

 

 

Depreciation and amortization expense was $4.9 million, $5.5 million and $5.6 million for the years ended 2016, 2015, and 2014 respectively.