Commitments and Contingencies (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Jan. 02, 2011
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase obligation	$ 468,000
Total rent expense, net of sublease income	493,000	464,000	465,000
Wafer purchase commitment [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Outstanding commitment for purchases	$ 621,000	$ 532,000