Geographic and Significant Customer Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013 segment	Sep. 29, 2012
Geographic and Significant Customer Information [Abstract]
Number of operating segments			1
Total net revenues:
Total net revenues	$ 39,044	$ 43,938	$ 98,148	$ 152,611
United States [Member]
Total net revenues:
Total net revenues	15,665	6,888	41,426	32,337
China [Member]
Total net revenues:
Total net revenues	901	1,270	6,952	3,907
Japan [Member]
Total net revenues:
Total net revenues	2,387	5,896	9,617	12,746
South Korea [Member]
Total net revenues:
Total net revenues	9,805	18,554	18,946	75,663
Israel [Member]
Total net revenues:
Total net revenues	486	147	1,248	6,623
Taiwan [Member]
Total net revenues:
Total net revenues	3,737	6,233	6,959	12,105
Singapore [Member]
Total net revenues:
Total net revenues	2,157	792	6,602	1,579
All other [Member]
Total net revenues:
Total net revenues	$ 3,906	$ 4,158	$ 6,398	$ 7,651