Net Income/(Loss) Per Share (Narrative) (Details) - shares	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020
Earnings Per Share [Abstract]
Diluted net income per share excluded dilutive unvested share-based awards	0	0	0	162,000