Property, Plant, and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Property, Plant, and Equipment

Property, plant, and equipment consisted of the following (in thousands):

	December 31,
	2019			2018
Land	$	3,951		$	3,951
Buildings	24,533			24,533
Building improvements	49,289			45,067
Leasehold improvements	10,790			9,095
Computer hardware and software	67,474			66,542
Manufacturing test equipment	31,278			27,378
Furniture and fixtures	6,800			6,904
	194,115			183,470
Less: accumulated depreciation	(104,672		)	(92,074		)
	$	89,443		$	91,396