Interest Income and Other (Expense) Income, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 25, 2015	Jan. 26, 2014
Interest Income and Other Expense Disclosure [Abstract]
Interest income	$ 13	$ 43	$ 342
Non-recoverable VAT tax	(494)	(323)	(598)
Foreign currency transaction gain (loss)	(665)	702	(648)
Miscellaneous expense	(655)	(257)	(486)
Interest income and other income (expense), net	$ (1,801)	$ 165	$ (1,390)