Property, Plant, and Equipment (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Plant, and Equipment

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

	December 31,
	2020		2019
Land	$	3,951	$	3,951
Buildings	24,533		24,533
Building improvements	45,978		49,289
Leasehold improvements	12,682		10,790
Computer hardware and software	58,162		67,474
Manufacturing test equipment	29,816		31,278
Furniture and fixtures	6,372		6,800
	181,494		194,115
Less: accumulated depreciation	(102,321)		(104,672)
	$	79,173	$	89,443