Segment and Geographical Information - Major Customer (Details)	3 Months Ended		6 Months Ended	3 Months Ended	6 Months Ended
	Jul. 03, 2011	Jul. 01, 2012 Americas [Member] NRG Solar, Inc. [Member]	Jul. 01, 2012 Americas [Member] NRG Solar, Inc. [Member]	Jul. 01, 2012 Americas [Member] Customer B [Member]	Jul. 03, 2011 Americas [Member] Customer C [Member]
Revenue, Major Customer [Line Items]
Revenue as a percentage of total revenue	18.00%	25.00%	24.00%	17.00%	11.00%