Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

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	2019			2018
Leasehold improvements	$	6,745		$	6,405
Machinery and equipment	41,243			38,454
Construction in progress	1,679			1,241
Total property, plant and equipment, at cost	49,667			46,100
Accumulated depreciation	(26,473		)	(21,834		)
Property, plant and equipment, net	$	23,194		$	24,266