Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 51,319	$ 60,508
Less: accumulated depreciation and amortization	(45,185)	(50,722)
Property and equipment, net	6,134	9,786
Depreciation	5,600	7,000	$ 8,000
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	22,049	24,643
Office Equipment And Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	25,087	30,702
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 4,183	$ 5,163