Information Concerning Product Lines, Geographic Information and Revenue Concentration (Schedule of Revenue by Geographical Area) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 3,657	$ 5,339	$ 11,858	$ 16,623
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	1,307	1,730	3,796	6,398
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	848	587	2,657	1,778
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	267	603	1,626	2,474
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	727	1,668	1,805	3,733
Malaysia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	411	437	1,363	1,503
Rest of Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	32	204	390	480
Rest of North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 65	$ 110	$ 221	$ 257