Geographic and Significant Customer Information (Details 2)	Jun. 30, 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	29.90%	11.40%
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	22.60%	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	0.00%	16.90%