Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment as of December 31 were as follows (in thousands):

	2021			2020
Land	$	3,600		$	3,600
Buildings and improvements		50,138			45,905
Machinery and equipment		247,926			233,635
Furniture and fixtures		9,825			8,429
Construction in-progress and deposits		48,088			17,987
		359,577			309,556
Accumulated depreciation and amortization		(248,226	)		(239,162	)
Right of use asset — net		4,624			4,449
Net balance	$	115,975		$	74,843