Property, Plant, and Equipment, net

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, net

Property, Plant, and Equipment, net

As of December 31, 2019 and 2018, property, plant, and equipment, net consists of the following :

		As of December 31,
		2019		2018
	(In thousands)
Buildings		$	9,142	$	9,142
Leasehold improvements		20,048		16,570
Aircraft		320		320
Machinery and equipment		33,608		22,114
IT software and equipment		17,151		13,602
Construction in progress		3,674		620
		83,943		62,368
Less accumulated depreciation and amortization		(34,610)		(28,154)
Property, plant, and equipment, net		$	49,333	$	34,214

Total depreciation and amortization for the years ended December 31, 2019, 2018 and 2017 was $6.9 million, $5.8 million and $5.1 million, respectively, of which $3.7 million, $1.2 million and $1.4 million was recorded in research and development expense, respectively. Depreciation and amortization of assets acquired under finance leases was $0.10 million, $0.08 million and $0.08 million for the years ended December 31, 2019, 2018 and 2017, respectively.