Business Enterprise Segments, Significant Customer and Geographical Information (Details 2)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Percentage of net revenue from sales to significant customers including their manufacturing subcontractors
Five largest customers as a group	45.30%	44.00%	46.60%	41.60%
Percentage of product revenue
Percentage of product revenue	100.00%	100.00%	100.00%	100.00%
China (exclusive of Hong Kong) [Member]
Percentage of product revenue
Percentage of product revenue	31.90%	35.00%	31.70%	33.90%
Hong Kong [Member]
Percentage of product revenue
Percentage of product revenue	27.90%	26.80%	26.80%	26.60%
Singapore, Taiwan, Thailand and Japan [Member]
Percentage of product revenue
Percentage of product revenue	28.00%	23.10%	27.80%	23.90%
United States [Member]
Percentage of product revenue
Percentage of product revenue	2.90%	3.10%	3.20%	3.40%
Europe [Member]
Percentage of product revenue
Percentage of product revenue	1.90%	1.90%	1.80%	2.10%
Other [Member]
Percentage of product revenue
Percentage of product revenue	7.40%	10.10%	8.70%	10.10%