Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Abstract]

Summary of Property, Plant and Equipment

Property, plant and equipment is comprised of the following:

	As of
	June 30,			December 31,
	2019			2018
Land	$	1,136		$	1,136
Buildings and improvements	73,735			70,522
Machinery and equipment	225,513			231,619
Less: Accumulated depreciation	(200,506		)	(203,876		)
Property, plant and equipment, net	$	99,878		$	99,401
Depreciation expense for the six months ended June 30, 2019				$	8,537
Depreciation expense for the six months ended June 30, 2018				$	7,537