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Commitments and Contingencies (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012 Wafer purchase commitment [Member]	Jan. 01, 2012 Wafer purchase commitment [Member]	Jul. 01, 2012 Other goods and services [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Outstanding commitment for purchases					$ 487,000	$ 532,000	$ 1,600,000
Total rent expense, net of sublease income	$ 125,000	$ 114,000	$ 250,000	$ 230,000

The floor amount as of the balance sheet date that the entity must expend to satisfy the terms of disclosed arrangements (excluding long-term commitments) in which the entity has agreed to expend funds to procure goods or services from one or more suppliers, other than under a long-term purchase commitment or an unconditional purchase obligation.

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