Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Unrestricted stock [Member]	Common Stock [Member]	Common Stock [Member] Unrestricted stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Unrestricted stock [Member]	Accumulated deficit [Member]
Balance at Feb. 02, 2019	$ 615,094		$ 557		$ 352,702		$ 261,835
Balance, common stock, shares at Feb. 02, 2019			55,759,048
Share-based compensation expense	12,136				12,136
Issuance of unrestricted stock awards		$ 198				$ 198
Issuance of unrestricted stock awards (in shares)				1,634
Exercise of options to purchase common stock	4,109		$ 2		4,107
Exercise of options and warrants to purchase common stock (in shares)			141,582
Vesting of restricted stock units and performance-based restricted stock units	2		$ 2
Vesting of restricted stock units and performance-based restricted stock units (in shares)			(227,020)
Common Shares Withheld	(10,367)		$ (1)		(10,366)
Common shares withheld for taxes (in shares)			83,121
Repurchase and retirement of common stock	36,885				36,882
Repurchase and retirement of stock (in shares)			(337,552)
Issuance of common stock to employees under employee stock purchase plan	435				435
Issuance of common stock to employees under employee stock purchase plan (in shares)			3,456
Net income	175,056						175,056
Balance at Feb. 01, 2020	759,778		$ 557		322,330		436,891
Balance, common stock, shares at Feb. 01, 2020			55,712,067
Issuance of unrestricted stock awards	9,294	208			9,294	208
Issuance of unrestricted stock awards (in shares)				1,518
Exercise of options to purchase common stock	5,346		$ 2		5,344
Exercise of options and warrants to purchase common stock (in shares)			176,846
Vesting of restricted stock units and performance-based restricted stock units	2		$ 2
Vesting of restricted stock units and performance-based restricted stock units (in shares)			(230,002)
Common Shares Withheld	(3,917)		$ (1)		(3,916)
Common shares withheld for taxes (in shares)			51,734
Repurchase and retirement of common stock	12,663		$ (1)		12,662
Repurchase and retirement of stock (in shares)			(137,023)
Issuance of common stock to employees under employee stock purchase plan	477				477
Issuance of common stock to employees under employee stock purchase plan (in shares)			3,561
Net income	123,361						123,361
Balance at Jan. 30, 2021	$ 881,886		$ 559		321,075		560,252
Balance, common stock, shares at Jan. 30, 2021	55,935,237		55,935,237
Issuance of unrestricted stock awards	$ 25,378	$ 335			25,378	$ 335
Exercise of options to purchase common stock	389		$ 0		389
Exercise of options and warrants to purchase common stock (in shares)			12,834
Vesting of restricted stock units and performance-based restricted stock units	1		$ 1
Vesting of restricted stock units and performance-based restricted stock units (in shares)			(115,763)	(1,790)
Common Shares Withheld	(7,332)		$ 0		(7,332)
Common shares withheld for taxes (in shares)			38,342
Repurchase and retirement of common stock	60,011		$ (4)		60,007
Repurchase and retirement of stock (in shares)			(368,699)
Issuance of common stock to employees under employee stock purchase plan	828				828
Issuance of common stock to employees under employee stock purchase plan (in shares)			3,817
Net income	278,810
Balance at Jan. 29, 2022	$ 1,120,284		$ 556		$ 280,666		$ 839,062
Balance, common stock, shares at Jan. 29, 2022	55,662,400		55,662,400