Net Income (Loss) Per Share - Schedule of Weighted-Average Shares Used for Net Income per Share (Detail) - shares	3 Months Ended								12 Months Ended
	Feb. 01, 2020	Nov. 02, 2019	Aug. 03, 2019	May 04, 2019	Feb. 02, 2019	Nov. 03, 2018	Aug. 04, 2018	May 05, 2018	Feb. 01, 2020	Feb. 02, 2019	Feb. 03, 2018
Net Income (Loss) Per Share
Weighted-average shares-basic	19,120,709	18,765,769	18,465,876	19,976,858	20,901,841	22,082,141	21,925,702	21,545,025	19,082,303	21,613,678	27,053,616
Effect of dilutive stock-based awards									4,554,682	4,567,303
Effect of dilutive convertible senior notes									662,049	352,244
Weighted-average shares-diluted	25,767,864	24,170,172	22,324,112	24,933,987	25,702,791	27,703,319	27,496,561	25,230,228	24,299,034	26,533,225	27,053,616