Net Income Per Share - Schedule of Weighted-Average Shares Used for Net Income per Share (Detail) - shares		3 Months Ended		6 Months Ended
		Aug. 01, 2020	Aug. 03, 2019	Aug. 01, 2020	Aug. 03, 2019
Net Income (Loss) Per Share
Weighted-average shares-basic		19,386,115	18,465,876	19,314,479	19,221,367
Effect of dilutive stock-based awards		5,205,159	3,858,236	4,787,988	4,165,391
Effect of dilutive convertible senior notes	[1]	1,973,431		1,281,263	242,292
Weighted-average shares-diluted		26,564,705	22,324,112	25,383,730	23,629,050

[1] The 2020 Notes, 2023 Notes and 2024 Notes have an impact on our dilutive share count beginning at stock prices of $118.13 per share, $193.65 per share and $211.40 per share, respectively. The 2020 Notes terminated on July 15, 2020 and did not have an impact on our dilutive share count post-termination. The warrants associated with our 2020 Notes, 2023 Notes and 2024 Notes have an impact on our dilutive share count beginning at stock prices of $189.00 per share, $309.84 per share and $338.24 per share, respectively. The warrants associated with our 2020 Notes expire through January 2021. Refer to Note 9—Convertible Senior Notes.