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Commitments and Contingencies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012 Wafer purchase commitment [Member]	Jan. 01, 2012 Wafer purchase commitment [Member]	Sep. 30, 2012 Other goods and services [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Outstanding commitment for purchases					$ 408	$ 532	$ 1,800
Total rent expense, net of sublease income	$ 120	$ 119	$ 370	$ 349

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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