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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 6 Months Ended
Jun. 30, 2013
Jul. 01, 2012
Jun. 30, 2013
Jul. 01, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenue $ 5,126 [1] $ 4,071 [1] $ 8,143 $ 8,201
Korea [Member]
        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenue 2,374 22 2,405 26
United States [Member]
        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenue 1,022 1,179 1,963 2,489
Japan [Member]
        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenue 510 929 1,112 1,809
China [Member]
        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenue 371 847 502 1,359
Malaysia [Member]
        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenue 346 344 1,031 952
Europe [Member]
        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenue 338 596 788 1,078
Rest of North America [Member]
        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenue 127 52 304 159
Rest of Asia Pacific [Member]
        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenue $ 38 $ 102 $ 38 $ 329
[1] For all periods presented: New products represent products introduced since 2005, and include ArcticLink®, ArcticLink II, ArcticLink III, Eclipse™ II, PolarPro®, PolarPro II, and QuickPCI® II. Mature products include Eclipse, EclipsePlus, pASIC® 1, pASIC 2, pASIC 3, QuickFC, QuickMIPS, QuickPCI, QuickRAM®, and V3, as well as royalty revenue, programming hardware and software.