Property and Equipment

6 Months Ended

Jun. 30, 2019

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, 2019			December 31, 2018
Land		—	$	875		$	875
Buildings	39-40			17,389			17,389
Building improvements	5-40			34,967			34,967
Machinery and equipment	3-15			61,217			61,217
Furniture, fixtures and office equipment	5-10			2,954			2,954
Computer equipment and software		3		8,355			8,355
Construction in progress		—		2,625			342
Total property and equipment, gross				128,382			126,099
Less accumulated depreciation				(101,236	)		(100,497	)
Total property and equipment, net			$	27,146		$	25,602

Depreciation expense related to property and equipment for the three and six months ended June 30, 2019 and 2018 was as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Depreciation Expense	$	371	$	445	$	739	$	886