Property, Plant, and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Property, Plant, and Equipment

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

	December 31,
	2018			2017
Land	$	3,951		$	3,951
Buildings	24,533			24,589
Building improvements	45,067			33,189
Leasehold improvements	9,095			6,513
Computer hardware and software	66,542			61,835
Manufacturing test equipment	27,378			21,312
Furniture and fixtures	6,904			6,363
	183,470			157,752
Less: accumulated depreciation	(92,074		)	(79,704		)
	$	91,396		$	78,048