Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment by type were as follows:

(in thousands)	As of June 30, 2021		As of December 31, 2020
Property, Plant and Equipment
Leasehold improvements	$	6,669	$	6,725
Machinery and equipment	43,619		43,030
Construction in progress	1,852		1,670
Total property, plant and equipment, at cost	52,140		51,425
Accumulated depreciation	(32,978)		(31,244)
Property, plant and equipment, net	$	19,162	$	20,181