Rescission Offer (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended
	Jan. 29, 2013	Dec. 29, 2012
Rescission Offer
Shares issued under the ESPP in the past twelve months that may be subject to rescissionary rights		501,000
Shares subject to rescissionary rights purchased at $12.06 per share		218,400
Original price one of shares subject to rescissionary rights.		$ 12.06
Original price two of shares subject to rescissionary rights.		$ 9.35
Maximum potential aggregate payments including statutory interest, if holders rescinded their purchases (in dollars)		$ 5.7
Maximum previous period that unregistered shares were issued which are applicable to the rescission offer	P12M