Geographic and Significant Customer Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Total net revenue
Total net revenues	$ 53,181	$ 64,372	$ 108,673	$ 126,515
United States [Member]
Total net revenue
Total net revenues	13,872	8,673	25,449	23,238
China [Member]
Total net revenue
Total net revenues	1,702	7,566	2,637	9,409
Israel [Member]
Total net revenue
Total net revenues	159	7,438	6,475	15,186
Japan [Member]
Total net revenue
Total net revenues	2,511	8,371	6,850	16,261
South Korea [Member]
Total net revenue
Total net revenues	29,638	22,474	57,109	47,617
Other [Member]
Total net revenue
Total net revenues	$ 5,299	$ 9,850	$ 10,153	$ 14,804