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. 03, 2018	$ 2	$ 840,765	$ (171)	$ 151,575	$ (1,000,326)	$ (8,155)
Balances, shares at Feb. 03, 2018	21,517,338				20,220,132
Stock-based compensation		13,879				13,879
Issuance of restricted stock, Shares	6,405
Vested and delivered restricted stock units		(7,863)				(7,863)
Vested and delivered restricted stock units, Shares	103,016
Exercise of stock options		29,209				29,209
Exercise of stock options, Shares	605,480
Repurchases of common stock					$ (243)	(243)
Repurchases of common stock, Shares	(2,800)				2,800
Equity component value of convertible note issuance-net		89,933				89,933
Sale of common stock warrant		51,021				51,021
Purchase of convertible note hedge		(91,857)				(91,857)
Impact of Topic 606 adoption				(21,036)		(21,036)
Net income				88,367		88,367
Net gains (losses) from foreign currency translation			(1,746)			(1,746)
Balances at Aug. 04, 2018	$ 2	925,087	(1,917)	218,906	$ (1,000,569)	141,509
Balances, shares at Aug. 04, 2018	22,229,439				20,222,932
Balances at May. 05, 2018	$ 2	851,228	(1,435)	156,000	$ (1,000,569)	5,226
Balances, shares at May. 05, 2018	21,612,197				20,222,932
Stock-based compensation		5,988				5,988
Issuance of restricted stock, Shares	6,405
Vested and delivered restricted stock units		(7,512)				(7,512)
Vested and delivered restricted stock units, Shares	82,906
Exercise of stock options		26,286				26,286
Exercise of stock options, Shares	527,931
Equity component value of convertible note issuance-net		89,933				89,933
Sale of common stock warrant		51,021				51,021
Purchase of convertible note hedge		(91,857)				(91,857)
Net income				62,906		62,906
Net gains (losses) from foreign currency translation			(482)			(482)
Balances at Aug. 04, 2018	$ 2	925,087	(1,917)	218,906	$ (1,000,569)	141,509
Balances, shares at Aug. 04, 2018	22,229,439				20,222,932
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	20,477,813
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
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	20,477,813
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					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					18,591,763