Geographic and Significant Customer Information (Details 3)	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
SK Hynix [Member]
Net revenues:
Customers accounted for 10% or more of total revenue	24.10%		18.90%	12.10%
Samsung Electronics Co. Ltd. [Member]
Net revenues:
Customers accounted for 10% or more of total revenue	17.40%	31.80%	31.60%	28.20%
Intel Corporation [Member]
Net revenues:
Customers accounted for 10% or more of total revenue	15.30%	14.30%	20.10%	18.60%
Taiwan Semiconductor Mfg. Co. [Member]
Net revenues:
Customers accounted for 10% or more of total revenue	12.80%