Significant Accounting Policies - Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 27, 2013		Jan. 29, 2012		Jan. 30, 2011
Unrealized holding gain (loss) on available-for-sale investments
Beginning balance	$ 37	[1]	$ 241	[1]	$ 317	[1]
Current-period other comprehensive (loss) income	(32)	[1]	(204)	[1]	(76)	[1]
Ending balance	5	[1]	37	[1]	241	[1]
Unrealized loss on interest rate hedge
Beginning balance	0		0		0
Current-period other comprehensive (loss) income	(353)		0		0
Ending balance	(353)		0		0
Cumulative translation adjustment
Beginning balance	498		502		501
Current-period other comprehensive (loss) income	203		(4)		1
Ending balance	701		498		502
Accumulated other comprehensive income
Beginning balance	535		743		818
Other comprehensive loss, net of tax	(182)		(208)		(75)
Ending balance	353		535		743
Net of reclassification adjustments for gains realized, net of tax from other comprehensive income to net income	$ 1		$ 5		$ 0

[1] Net of reclassification adjustments for gains realized, net of tax from other comprehensive income to net income $1 and $5 for the fiscal years 2013 and 2012, respectively. There were no reclassification adjustments for gains realized in fiscal year 2011.