Property, Plant and Equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

Property, plant and equipment, at cost, as of December 31, 2017 and 2016, consisted of:

	2017			2016
	(in thousands)
Land	$	257		$	257
Building and improvements	8,613			8,515
Machinery and equipment	9,142			7,515
Computer hardware and software	3,244			724
Furniture and fixtures	449			344
Construction in progress	55,017			15,496
	76,722			32,851
Less accumulated depreciation and amortization	(8,367		)	(6,636		)
Property, plant and equipment, net	$	68,355		$	26,215

The Company recorded depreciation and amortization expense of $1.7 million, $0.9 million and $0.6 million in 2017, 2016 and 2015, respectively. During the twelve months ended December 31, 2017 and 2016 there was $3.6 million of interest and $0.4 million of interest, respectively, capitalized into construction in progress. During the twelve months ended December 31, 2017 and 2016 there was $0.8 million of payroll and $0.4 million of payroll, respectively, capitalized into construction in progress.