Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment by type were as follows:

(in thousands)	As of March 31,			As of December 31,
Property, Plant and Equipment	2019			2018
Leasehold improvements	$	6,341		$	6,405
Machinery and equipment	38,928			38,454
Construction in progress	1,382			1,241
Total property, plant and equipment, at cost	46,651			46,100
Accumulated depreciation	(22,812		)	(21,834		)
Property, plant and equipment, net	$	23,839		$	24,266