Geographic and Significant Customer Information (Details 2)	Sep. 29, 2012	Dec. 31, 2011
SK Hynix [Member]
Customers accounted for 10% or more of total accounts receivable
Customers accounted for 10% or more of total accounts receivable	18.00%	11.40%
Taiwan Semiconductor Mfg. Co. [Member]
Customers accounted for 10% or more of total accounts receivable
Customers accounted for 10% or more of total accounts receivable	15.00%
Samsung Electronics Co. Ltd. [Member]
Customers accounted for 10% or more of total accounts receivable
Customers accounted for 10% or more of total accounts receivable	15.40%	30.00%
Intel Corporation [Member]
Customers accounted for 10% or more of total accounts receivable
Customers accounted for 10% or more of total accounts receivable	13.70%	16.90%