Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2022

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment by type were as follows:

(in thousands)	As of June 30, 2022		As of December 31, 2021
Property, Plant and Equipment
Leasehold improvements	$	7,107	$	7,107
Machinery and equipment	44,421		44,358
Construction in progress	822		1,125
Total property, plant and equipment, at cost	52,350		52,590
Accumulated depreciation	(37,322)		(35,246)
Property, plant and equipment, net	$	15,028	$	17,344