Summary of Significant Accounting Policies - Reconciliation of Denominator of Each Net Income (Loss) per Share Calculation (Details) - shares	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Nov. 01, 2014	Oct. 31, 2015	Nov. 01, 2014
Accounting Policies [Abstract]
Shares used in computing basic net (loss) income per share	70,082,048	69,235,168	69,777,630	69,018,319
Dilutive effect of options, restricted stock and convertible preferred stock	0	0	426,000	0
Shares used in computing diluted net (loss) income per share	70,082,048	69,235,168	70,203,837	69,018,319