Property, Plant, and Equipment (Tables)

3 Months Ended

Mar. 31, 2014

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Property, plant and equipment consisted of the following (in thousands):

	Estimated Useful Life (in years)			As of
				March 31, 2014			December 31, 2013
Leasehold improvements	5	to	20	$	2,850		$	2,869
Computer equipment	3	to	5	35,519			35,554
Machinery and equipment	3	to	5	5,755			5,648
Furniture and fixtures	5			700			688
Work in progress 1	N/A			4,630			4,281
Total cost				49,454			49,040
Accumulated depreciation				(40,784		)	(40,541		)
Total property, plant and equipment, net				$	8,670		$	8,499

¹ Work in progress includes internal use software development and production tooling construction in progress.