Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Estimated Useful Lives of Property, Plant and Equipment

Estimated useful lives are as follows:

Buildings	25-33 years
Tooling and equipment	2-7 Years
Computer equipment	3-5 Years
Software	3-7 Years
Furniture and fixtures	5-8 Years
Leasehold and building improvements	Lesser of lease term or useful life (approximately 2 to 10 years)

Property, plant, and equipment, net were as follows:

	December 31,
(In thousands)	2020		2019
Buildings	$	19,984	$	18,570
Computer equipment	10,213		9,935
Furniture and fixtures	3,972		3,905
Leasehold and building improvements	39,656		37,527
Machinery and equipment	101,117		94,274
Software	24,915		25,910
Tooling	34,379		32,267
	234,236		222,388
Accumulated depreciation	(154,216)		(135,254)
	80,020		87,134
Construction in progress	7,265		3,598
Total property, plant, and equipment, net	$	87,285	$	90,732

Construction in progress was as follows:

	December 31,
(In thousands)	2020		2019
Leasehold and building improvements	$	2,487	$	574
Machinery and equipment	3,075		1,428
Software	213		518
Tooling	1,397		759
Other	93		319
Total construction in progress	$	7,265	$	3,598