Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2018

Property Plant And Equipment [Abstract]

Property and Equipment, Net

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

	Estimated Useful
	Life (Years)		March 31, 2018			December 31, 2017
Land		—	$	875		$	875
Buildings	39-40			17,389			17,389
Building improvements	5-40			34,957			34,957
Machinery and equipment	3-15			62,681			62,681
Furniture, fixtures and office equipment	5-10			3,106			3,556
Computer equipment and software		3		8,416			8,416
				127,424			127,874
Less accumulated depreciation				(100,943	)		(100,952	)
Total property and equipment, net			$	26,481		$	26,922

Depreciation Expense Related To Property And Equipment

Depreciation expense related to property and equipment for the three months ended March 31, 2018 and 2017 was as follows (in thousands):

	Three Months Ended March 31,
	2018		2017
Depreciation Expense	$	441	$	446