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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
Mar. 31, 2013
Apr. 01, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue $ 3,017 [1] $ 4,130 [1]
United States [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 941 1,310
Japan [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 602 880
China [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 131 512
Europe [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 450 482
Malaysia [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 685 608
Rest of Asia Pacific [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue 31 231
Rest of North America [Member]
    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Revenue $ 177 $ 107
[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.