Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment by type were as follows:

(in thousands)	As of September 30, 2021		As of December 31, 2020
Property, Plant and Equipment
Leasehold improvements	$	6,714	$	6,725
Machinery and equipment	44,502		43,030
Construction in progress	1,466		1,670
Total property, plant and equipment, at cost	52,682		51,425
Accumulated depreciation	(34,120)		(31,244)
Property, plant and equipment, net	$	18,562	$	20,181