Property and Equipment (Tables)

9 Months Ended

Sep. 30, 2019

Property Plant And Equipment [Abstract]

Property and Equipment, Net

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

	Estimated Useful
	Life (Years)		September 30, 2019			December 31, 2018
Land		—	$	875		$	875
Buildings	39-40			17,389			17,389
Building improvements	5-40			37,543			34,967
Machinery and equipment	3-15			61,575			61,217
Furniture, fixtures and office equipment	5-10			3,004			2,954
Computer equipment and software		3		8,355			8,355
Construction in progress		—		17			342
Total property and equipment, gross				128,758			126,099
Less accumulated depreciation				(101,632	)		(100,497	)
Total property and equipment, net			$	27,126		$	25,602

Depreciation Expense Related to Property and Equipment

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2019		2018		2019		2018
Depreciation Expense	$	396	$	404	$	1,135	$	1,289