Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Summary of Property, Plant and Equipment

Estimated useful lives by each type of asset category are as follows:

	Years
Buildings	Up to 39
Leasehold improvements	Lesser of (i) expected useful life of improvement or (ii) life of lease (including likely extension thereof)
Machinery and equipment	1 to 10

Property, plant and equipment by type were as follows:

(in thousands)	As of December 31,
Property, Plant and Equipment	2021		2020
Leasehold improvements	$	7,107	$	6,725
Machinery and equipment	44,358		43,030
Construction in progress	1,125		1,670
Total property, plant and equipment, at cost	52,590		51,425
Accumulated depreciation	(35,246)		(31,244)
Property, plant and equipment, net	$	17,344	$	20,181