Property and Equipment

6 Months Ended

Jun. 30, 2021

Property Plant And Equipment [Abstract]

Property and Equipment

4. Property and Equipment

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 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