Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)	Treasury Stock	Total
Balances at Feb. 02, 2019	$ 2	$ 356,422	$ (2,333)	$ (392,538)	$ (243)	$ (38,690)
Balances, shares at Feb. 02, 2019	20,477,813				2,800
Stock-based compensation		10,779				10,779
Issuance of restricted stock, Shares	7,014
Vested and delivered restricted stock units		(6,234)				(6,234)
Vested and delivered restricted stock units, Shares	101,641
Exercise of stock options		7,223				7,223
Exercise of stock options, Shares	172,649
Repurchases of common stock					$ (250,032)	(250,032)
Repurchases of common stock, Shares	(2,167,396)				2,167,396
Retirement of treasury stock		(13,180)		(237,091)	$ 250,271
Retirement of treasury stock, Shares					(2,170,154)
Net income				99,479		99,479
Net gains (losses) from foreign currency translation			(447)			(447)
Conversion of convertible senior notes					$ 4	4
Conversion of convertible senior notes, Shares	42				(42)
Balances at Aug. 03, 2019	$ 2	355,010	(2,780)	(530,150)		(177,918)
Balances, shares at Aug. 03, 2019	18,591,763
Balances at May. 04, 2019	$ 2	362,986	(3,270)	(356,816)	$ (250,275)	(247,373)
Balances, shares at May. 04, 2019	18,357,816				2,170,196
Stock-based compensation		5,191				5,191
Issuance of restricted stock, Shares	7,014
Vested and delivered restricted stock units		(5,984)				(5,984)
Vested and delivered restricted stock units, Shares	80,400
Exercise of stock options		5,997				5,997
Exercise of stock options, Shares	146,491
Retirement of treasury stock		(13,180)		(237,091)	$ 250,271
Retirement of treasury stock, Shares					(2,170,154)
Net income				63,757		63,757
Net gains (losses) from foreign currency translation			490			490
Conversion of convertible senior notes					$ 4	4
Conversion of convertible senior notes, Shares	42				(42)
Balances at Aug. 03, 2019	$ 2	355,010	(2,780)	(530,150)		(177,918)
Balances, shares at Aug. 03, 2019	18,591,763
Balances at Feb. 01, 2020	$ 2	430,662	(2,760)	(409,253)		18,651
Balances, shares at Feb. 01, 2020	19,236,681
Stock-based compensation		12,476				12,476
Issuance of restricted stock, Shares	3,192
Vested and delivered restricted stock units		(6,818)				(6,818)
Vested and delivered restricted stock units, Shares	70,292
Exercise of stock options		8,125				8,125
Exercise of stock options, Shares	176,278
Repurchases of common stock					$ (72)	(72)
Repurchases of common stock, Shares	(600)				600
Retirement of treasury stock		(72)			$ 72	$ (100)
Retirement of treasury stock, Shares					(600)	(600)
Net income				95,211		$ 95,211
Net gains (losses) from foreign currency translation			918			918
Conversion of convertible senior notes		(315,708)			$ 315,708
Conversion of convertible senior notes, Shares	1,131,645				(1,131,645)
Exercise of call option under bond hedge upon settlement of convertible senior notes		315,713			$ (315,713)
Exercise of call option under bond hedge upon settlement of convertible senior notes (in shares)	(1,131,662)				1,131,662
Balances at Aug. 01, 2020	$ 2	444,378	(1,842)	(314,042)	$ (5)	128,491
Balances, shares at Aug. 01, 2020	19,485,826				17
Balances at May. 02, 2020	$ 2	436,799	(5,132)	(412,465)	$ (72)	19,132
Balances, shares at May. 02, 2020	19,264,127				600
Stock-based compensation		6,755				6,755
Issuance of restricted stock, Shares	3,192
Vested and delivered restricted stock units		(6,437)				(6,437)
Vested and delivered restricted stock units, Shares	60,006
Exercise of stock options		7,328				7,328
Exercise of stock options, Shares	158,518
Retirement of treasury stock		(72)			$ 72
Retirement of treasury stock, Shares					(600)
Net income				98,423		98,423
Net gains (losses) from foreign currency translation			3,290			3,290
Conversion of convertible senior notes		(315,708)			$ 315,708
Conversion of convertible senior notes, Shares	1,131,645				(1,131,645)
Exercise of call option under bond hedge upon settlement of convertible senior notes		315,713			$ (315,713)
Exercise of call option under bond hedge upon settlement of convertible senior notes (in shares)	(1,131,662)				1,131,662
Balances at Aug. 01, 2020	$ 2	$ 444,378	$ (1,842)	$ (314,042)	$ (5)	$ 128,491
Balances, shares at Aug. 01, 2020	19,485,826				17