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		17,457				17,457
Issuance of restricted stock, Shares	6,405
Vested and delivered restricted stock units		(8,947)				(8,947)
Vested and delivered restricted stock units, Shares	114,847
Exercise of stock options		35,827				35,827
Exercise of stock options, Shares	735,029
Repurchases of common stock					$ (145,425)	(145,425)
Repurchases of common stock, Shares	(1,163,679)				1,163,679
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 hedges		(91,857)				(91,857)
Impact of Topic 606 adoption				(21,036)		(21,036)
Net income				108,481		108,481
Net gains (losses) from foreign currency translation			(2,129)			(2,129)
Balances at Nov. 03, 2018	$ 2	934,199	(2,300)	239,020	$ (1,145,751)	25,170
Balances, shares at Nov. 03, 2018	21,209,940				21,383,811
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
Stock-based compensation		3,578				3,578
Vested and delivered restricted stock units		(1,084)				(1,084)
Vested and delivered restricted stock units, Shares	11,831
Exercise of stock options		6,618				6,618
Exercise of stock options, Shares	129,549
Repurchases of common stock					$ (145,182)	(145,182)
Repurchases of common stock, Shares	(1,160,879)				1,160,879
Net income				20,114		20,114
Net gains (losses) from foreign currency translation			(383)			(383)
Balances at Nov. 03, 2018	$ 2	934,199	(2,300)	239,020	$ (1,145,751)	25,170
Balances, shares at Nov. 03, 2018	21,209,940				21,383,811
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		15,788				$ 15,788
Issuance of restricted stock, Shares	7,014
Vested and delivered restricted stock units		(6,538)				(6,538)
Vested and delivered restricted stock units, Shares	104,608
Exercise of stock options		18,509				18,509
Exercise of stock options, Shares	452,219
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)
Equity component value of convertible note issuance-net		87,070				87,070
Sale of common stock warrant		50,225				50,225
Purchase of convertible note hedges		(91,350)				(91,350)
Shares issued in connection with warrant agreements	54,009
Net income				151,942		151,942
Net gains (losses) from foreign currency translation			(148)			(148)
Conversion of convertible senior notes					$ 4	4
Conversion of convertible senior notes, Shares	42				(42)
Balances at Nov. 02, 2019	$ 2	416,946	(2,481)	(477,687)		$ (63,220)
Balances, shares at Nov. 02, 2019	18,928,309					18,928,309
Balances at Aug. 03, 2019	$ 2	355,010	(2,780)	(530,150)		$ (177,918)
Balances, shares at Aug. 03, 2019	18,591,763
Stock-based compensation		5,009				5,009
Vested and delivered restricted stock units		(304)				(304)
Vested and delivered restricted stock units, Shares	2,967
Exercise of stock options		11,286				11,286
Exercise of stock options, Shares	279,570
Equity component value of convertible note issuance-net		87,070				87,070
Sale of common stock warrant		50,225				50,225
Purchase of convertible note hedges		(91,350)				(91,350)
Shares issued in connection with warrant agreements	54,009
Net income				52,463		52,463
Net gains (losses) from foreign currency translation			299			299
Balances at Nov. 02, 2019	$ 2	$ 416,946	$ (2,481)	$ (477,687)		$ (63,220)
Balances, shares at Nov. 02, 2019	18,928,309					18,928,309