Interest Income and Other (Expense) Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2017	May 01, 2016
Other Income and Expenses [Abstract]
Interest income	$ 94	$ 27
Non-recoverable VAT tax	(132)	(106)
Foreign currency transaction (loss) gain	(486)	92
Miscellaneous expense	(108)	(58)
Non-operating expense, net	$ (632)	$ (45)