Net Income (Loss) Per Share - Schedule of Weighted-Average Shares Used for Net Income (Loss) per Share (Detail) - shares		3 Months Ended		6 Months Ended
		Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017
Earnings Per Share [Abstract]
Weighted-average shares—basic		21,925,702	28,398,307	21,735,364	35,667,217
Effect of dilutive stock-based awards		5,158,591		4,421,897
Effect of dilutive convertible senior notes	[1]	412,268		206,134
Weighted-average shares—diluted		27,496,561	28,398,307	26,363,395	35,667,217

[1] The 2019 Notes, 2020 Notes and 2023 Notes have an impact on the Company’s dilutive share count beginning at stock prices of $116.09 per share, $118.13 per share and $193.65 per share, respectively