CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment
Beginning balance, value at Jan. 27, 2018	$ 724,996		$ 10,395	$ 6,170	$ (1,146)	$ 709,577
Beginning balance, shares at Jan. 27, 2018			31,185,669
Increase (Decrease) in Stockholders' Equity
Stock options exercised, value	871		$ 27	844
Stock options exercised, shares			82,235
Stock-based compensation	20,187		$ 1	20,186
Stock-based compensation, shares			3,122
Issuance of restricted stock, net of tax withholdings	(4,657)		$ 54	(4,711)		0
Issuance of restricted stock, net of tax withholdings, shares			159,005
Other comprehensive income (loss)	(136)				(136)
Net Income	62,907					62,907
Ending balance, value at Jan. 26, 2019	804,168		$ 10,477	22,489	(1,282)	772,484
Ending balance, shares at Jan. 26, 2019			31,430,031
Increase (Decrease) in Stockholders' Equity
Stock options exercised, value	503		$ 15	488
Stock options exercised, shares			45,258
Stock-based compensation	10,034		$ 1	10,033
Stock-based compensation, shares			2,803
Issuance of restricted stock, net of tax withholdings	(1,698)		$ 35	(1,733)
Issuance of restricted stock, net of tax withholdings, shares			105,846
Equity component of the settlement of 0.75% convertible senior notes due 2021, net of taxes	(1,206)			(1,206)
Purchase of warrants	(301)			(301)
Settlement of convertible note hedges related to extinguishment of convertible debt	388			388
Other comprehensive income (loss)	(499)				(499)
Net Income	57,215					57,215
Ending balance, value at Jan. 25, 2020	$ 868,604	$ (471)	$ 10,528	30,158	(1,781)	829,699	$ (471)
Ending balance, shares at Jan. 25, 2020	31,583,938		31,583,938
Increase (Decrease) in Stockholders' Equity
Stock options exercised, value	$ 5,738		$ 98	5,640
Stock options exercised, shares			295,650
Stock-based compensation	12,771		$ 1	12,770
Stock-based compensation, shares			4,962
Issuance of restricted stock, net of tax withholdings	(728)		$ 19	(747)
Issuance of restricted stock, net of tax withholdings, shares			54,998
Equity component of the settlement of 0.75% convertible senior notes due 2021, net of taxes	(8,976)			(8,976)
Purchase of warrants	(7,176)			(7,176)
Settlement of convertible note hedges related to extinguishment of convertible debt	7,197			7,197
Repurchase of common stock, value	100,000		$ (441)	(36,582)		(62,977)
Repurchase of common stock, shares			(1,324,381)
Other comprehensive income (loss)	12				12
Net Income	34,337					34,337
Ending balance, value at Jan. 30, 2021	$ 811,308		$ 10,205	$ 2,284	$ (1,769)	$ 800,588
Ending balance, shares at Jan. 30, 2021	30,615,167		30,615,167