Property,Plant and Equipment (Details) - Property, Plant and Equipment (USD $) In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Land and buildings	$ 13,893	$ 13,893
Machinery and equipment	27,567	27,549
Office furniture and equipment	1,902	1,902
Construction in process	14	16
Property, plant and equipment, at cost	43,376	43,360
Less accumulated depreciation	35,533	23,216
Property, plant and equipment, net	$ 7,843	$ 20,144