Segment, Geographic, Product and Significant Customer Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Total net revenue
Total net revenues	$ 182,881	$ 230,061	$ 188,065
United States [Member]
Total net revenue
Total net revenues	44,811	50,447	65,099
Japan [Member]
Total net revenue
Total net revenues	16,832	34,806	19,776
South Korea [Member]
Total net revenue
Total net revenues	79,555	87,533	54,156
Other [Member]
Total net revenue
Total net revenues	$ 41,683	$ 57,275	$ 49,034