Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property Plant And Equipment [Abstract]

Property and Equipment, Net

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

	Estimated Useful		December 31,
	Life (Years)		2017			2016
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			62,992
Furniture, fixtures and office equipment	5-10			3,556			3,556
Computer equipment and software		3		8,416			8,531
Construction in progress		—		—			202
				127,874			128,502
Less accumulated depreciation				(100,952	)		(99,575	)
Total property and equipment, net			$	26,922		$	28,927