Net Income (Loss) Per Share - Schedule of Weighted-Average Shares Used for Net Income (Loss) per Share (Detail) - shares	3 Months Ended		9 Months Ended
	Oct. 28, 2017	Oct. 29, 2016	Oct. 28, 2017	Oct. 29, 2016
Earnings Per Share [Abstract]
Weighted-average shares—basic	21,221,848	40,730,059	29,076,556	40,653,091
Effect of dilutive stock-based awards	2,313,769	196,391	1,516,826
Weighted-average shares—diluted	23,535,617	40,926,450	30,593,382	40,653,091