Property, Plant, and Equipment, net (Tables)

3 Months Ended

Mar. 31, 2020

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant, and Equipment

The estimated useful lives of property and equipment are principally as follows:

Asset	Useful Life
Buildings	39 years
Leasehold Improvements	Shorter of the estimated useful life or lease term
Aircraft	20 years
Machinery & equipment	5 to 7 years
IT software and equipment	3 to 5 years

As of March 31, 2020, December 31, 2019 and 2018, property, plant, and equipment, net consists of the following :

	As of March 31,		As of December 31,
	2020		2019		2018
	(Unaudited)
	(In thousands)
Buildings	$	9,142	$	9,142	$	9,142
Leasehold improvements	23,762		20,048		16,570
Aircraft	320		320		320
Machinery and equipment	34,000		33,608		22,114
IT software and equipment	17,282		17,151		13,602
Construction in progress	4,564		3,674		620
	89,070		83,943		62,368
Less accumulated depreciation and amortization	(36,688)		(34,610)		(28,154)
Property, plant, and equipment, net	$	52,382	$	49,333	$	34,214