Property and Equipment (Tables)

6 Months Ended

Jun. 30, 2021

Property Plant And Equipment [Abstract]

Property and Equipment, Net

Property and equipment consists of the following (in thousands):

	Estimated Useful
	Life (Years)		June 30, 2021			December 31, 2020
Land		—	$	875		$	875
Buildings	39-40			17,389			17,389
Building improvements	5-40			37,717			37,543
Machinery and equipment	3-15			55,081			55,054
Furniture, fixtures and office equipment	5-10			3,004			3,004
Computer equipment and software		3		8,319			8,319
Construction in progress		—		3,072			503
				125,457			122,687
Less accumulated depreciation				(97,318	)		(96,820	)
Total property and equipment, net			$	28,139		$	25,867

Depreciation Expense Related to Property and Equipment

Depreciation expense related to property and equipment for the three and six months ended June 30, 2021 and 2020 was as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Depreciation Expense	$	481	$	448	$	941	$	891