Summary of Significant Accounting Policies - Summary of Basic EPS and Diluted EPS Calculations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 03, 2018	Oct. 28, 2017	Jul. 29, 2017	Apr. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Net loss	$ (10,158)	$ (7,523)	$ (2,774)	$ (1,142)	$ (32,786)	$ (1,506)	$ (2,509)	$ 4,041	$ (21,597)	$ (32,760)	$ (4,483)
Net loss per share—Basic	$ (0.73)	$ (0.55)	$ (0.20)	$ (0.08)	$ (2.39)	$ (0.11)	$ (0.18)	$ 0.30	$ (1.57)	$ (2.39)	$ (0.33)
Net loss per share—Diluted	$ (0.73)	$ (0.55)	$ (0.20)	$ (0.08)	$ (2.39)	$ (0.11)	$ (0.18)	$ 0.30	$ (1.57)	$ (2.39)	$ (0.33)
Average number of shares outstanding—Basic									13,788	13,702	13,596
Average number of shares outstanding—Diluted									13,788	13,702	13,596