Credit Facility (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Nov. 01, 2014	Oct. 31, 2015	Nov. 01, 2014
Credit Facility
Maximum availability under credit facility		$ 50,000
Maximum availability for letters of credit		10,000
Deferred financing costs	$ 100	$ 47	$ 52
Unused commitment fee, as a percent		0.25%
Minimum availability requirement as a percentage of borrowing base		10.00%
Minimum availability requirement per covenant		$ 3,000
Borrowings under the credit facility	$ 0	0	$ 0
Borrowing base		43,600
Open on-demand letters of credit		200
Net available borrowing capacity under the credit facility		$ 39,000
Minimum
Credit Facility
Letters of credit fees (as a percent)		1.00%
Maximum
Credit Facility
Letters of credit fees (as a percent)		1.75%
London Interbank Offered Rate (LIBOR) | Minimum
Credit Facility
Basis spread on variable rate (as a percent)		1.50%
London Interbank Offered Rate (LIBOR) | Maximum
Credit Facility
Basis spread on variable rate (as a percent)		1.75%
Prime Rate | Minimum
Credit Facility
Basis spread on variable rate (as a percent)		0.50%
Prime Rate | Maximum
Credit Facility
Basis spread on variable rate (as a percent)		0.75%