Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment by type were as follows:

(in thousands)	As of June 30,			As of December 31,
Property, Plant and Equipment	2019			2018
Leasehold improvements	$	6,475		$	6,405
Machinery and equipment	39,851			38,454
Construction in progress	1,150			1,241
Total property, plant and equipment, at cost	47,476			46,100
Accumulated depreciation	(24,040		)	(21,834		)
Property, plant and equipment, net	$	23,436		$	24,266