CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Cumulative effect from implementation of ASU 2016-13	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative effect from implementation of ASU 2016-13
Beginning balance at Jan. 25, 2020	$ 868,604	$ (471)	$ 10,528	$ 30,158	$ (1,781)	$ 829,699	$ (471)
Beginning balance (shares) at Jan. 25, 2020			31,583,938
Increase (Decrease) in Stockholders' Equity
Stock options exercised	242		$ 5	237
Stock options exercised (shares)			15,425
Stock-based compensation	2,322		$ 1	2,321
Stock-based compensation (shares)			1,428
Issuance of restricted stock, net of tax withholdings	(326)		$ 10	(336)
Issuance of restricted stock, net of tax withholdings (shares)			31,870
Equity component of the settlement of 0.75% convertible senior notes due 2021, net of taxes	(3,971)			(3,971)
Purchase of warrants	(398)			(398)
Settlement of convertible note hedges related to extinguishment of convertible debt	341			341
Other comprehensive income	(31)				(31)
Net income	(32,418)					(32,418)
Ending balance at Apr. 25, 2020	833,894		$ 10,544	28,352	(1,812)	796,810
Ending balance (shares) at Apr. 25, 2020			31,632,661
Beginning balance at Jan. 30, 2021	$ 811,308		$ 10,205	2,284	(1,769)	800,588
Beginning balance (shares) at Jan. 30, 2021	30,615,167		30,615,167
Increase (Decrease) in Stockholders' Equity
Stock options exercised	$ 366		$ 4	362
Stock options exercised (shares)			11,169
Stock-based compensation	3,740		$ 0	3,740
Stock-based compensation (shares)			704
Issuance of restricted stock, net of tax withholdings	(6,361)		$ 50	(2,579)		(3,832)
Issuance of restricted stock, net of tax withholdings (shares)			151,114
Other comprehensive income	2				2
Net income	898					898
Ending balance at May. 01, 2021	$ 809,953		$ 10,259	$ 3,807	$ (1,767)	$ 797,654
Ending balance (shares) at May. 01, 2021	30,778,154		30,778,154