Segment Information Revenue and Accounts Receivable by major customer (Details)	12 Months Ended
	Jan. 29, 2012	Jan. 30, 2011	Jan. 31, 2010
Customer A [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue from significant customers	0.11	0.00	0.00
Customer B [Member]
Revenue, Major Customer [Line Items]
Percentage of revenue from significant customers	0.00	0.12	0.12
Customer A (AR) [Member]
Revenue, Major Customer [Line Items]
Percentage of accounts receivable from significant customers (in hundredths)	0.20	0.11