Property, Plant and Equipment

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment, at cost, as of December 31, 2018 and 2017, consisted of (in thousands):

	2018		2017
Land	$	401	$	257
Building and improvements	53,813		8,613
Machinery and equipment	12,229		9,142
Computer hardware and software	4,182		3,244
Furniture and fixtures	694		449
Construction in progress	30,949		55,017
	102,268		76,722
Less accumulated depreciation and amortization	(10,493)		(8,367)
Property, plant and equipment, net	$	91,775	$	68,355

The Company recorded depreciation expense of $2.6 million, $1.7 million and $0.9 million in 2018, 2017 and 2016, respectively.

During the twelve months ended December 31, 2018 and 2017 there were $4.4 million of interest and $3.6 million of interest, respectively, capitalized into construction in progress. During the twelve months ended December 31, 2018 and 2017 there were $1.8 million of payroll and $0.8 million of payroll, respectively, capitalized into construction in progress. The Company received certificate of completion of its building in the fourth quarter of 2018 and therefore reclassified a total of $37.0 million from Construction in process to Building and improvements upon completion.