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PROPERTY, PLANT, AND EQUIPMENT
 12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT, AND EQUIPMENT
5. PROPERTY, PLANT, AND EQUIPMENT
 
Property, Plant, and Equipment consist of the following as of December 31:
 
(in thousands)
 
2015
 
2014
 
Land
 
$
87
 
$
87
 
Buildings
 
 
3,682
 
 
3,682
 
Machinery, furniture and equipment
 
 
5,623
 
 
4,822
 
Construction in progress
 
 
2,189
 
 
426
 
 
 
 
11,581
 
 
9,017
 
Less: accumulated depreciation
 
 
(4,450)
 
 
(3,794)
 
Property, Plant, and Equipment, net
 
$
7,131
 
$
5,223
 
 
Depreciation expense for the years ended December 31, 2015, 2014, and 2013 totaled $0.7 million, $0.6 million, and $0.5 million, respectively. During the year ended December 31, 2015, there was $56 thousand of interest capitalized into construction in progress. During the years ended December 31, 2014 and 2013, there was no material interest capitalized into construction in progress.