PROPERTY, PLANT, AND EQUIPMENT

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT, AND EQUIPMENT

4. PROPERTY, PLANT, AND EQUIPMENT

Property, plant, and equipment consist of the following as of December 31:

(in thousands)	2017		2016
Land	$	160	$	160
Buildings		3,835		3,756
Machinery, furniture, and equipment		12,334		8,176
Construction in progress		10,663		4,293
		26,992		16,385
Less: accumulated depreciation		(6,589)		(5,387)
Property, Plant, and Equipment, net	$	20,403	$	10,998

Depreciation expense for the years ended December 31, 2017, 2016, and 2015 totaled $1.2 million, $0.9 million, and $0.7 million, respectively. During the years ended December 31, 2017 and 2016, there was $0.6 million and $0.2 million of interest capitalized into construction in progress.