Segment and Geographic Information (Revenue by Primary Distributor) (Details)	9 Months Ended	12 Months Ended
	Oct. 01, 2011	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Revenue, Major Customer [Line Items]
Revenue from all sell-through distributors		55.00%	61.00%	56.00%
Nu Horizons Electronics Corp. (including Arrow Electronics)
Revenue, Major Customer [Line Items]
Revenue from all sell-through distributors		33.00%	22.00%	18.00%
Weikeng Group
Revenue, Major Customer [Line Items]
Revenue from all sell-through distributors		14.00%	14.00%	14.00%
Avnet, Inc.
Revenue, Major Customer [Line Items]
Revenue from all sell-through distributors	20.00%	0.00%	17.00%	17.00%
All Others
Revenue, Major Customer [Line Items]
Revenue from all sell-through distributors		8.00%	8.00%	7.00%