Property, Plant and Equipment (Details) - Property, Plant and Equipment (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Land, buildings and leasehold improvements	$ 16,276	$ 14,049
Machinery and equipment	29,027	28,406
Office furniture and equipment	1,000	1,000
Construction in process	392	522
Property, plant and equipment, at cost	46,695	43,977
Less accumulated depreciation	25,511	24,107
Property, plant and equipment, net	$ 21,184	$ 19,870