Property, Plant, and Equipment (Tables)

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Property, Plant, and Equipment

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

	December 31,
	2021		2020
Land	$	3,951	$	3,951
Buildings	24,533		24,533
Building improvements	47,886		45,978
Leasehold improvements	10,436		12,682
Computer hardware and software	50,748		58,162
Manufacturing test equipment	30,562		29,816
Furniture and fixtures	6,449		6,372
	174,565		181,494
Less: accumulated depreciation	(97,019)		(102,321)
	$	77,546	$	79,173