Correction of an Immaterial Error in Prior Period Financial Statements - Impact of the Correction on the Consolidated Statement of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	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
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Provision for income taxes									$ (2,332)	$ 1,901
Net loss	$ (1,147)	$ (6,828)	$ (1,267)	$ (2,258)	$ 192	$ 63	$ (9,053)	$ (2,741)	$ (11,500)	$ (11,539)
Net loss per share:
Basic	$ (0.21)	$ (1.23)	$ (0.23)	$ (0.44)	$ 0.04	$ 0.01	$ (1.94)	$ (0.59)	$ (2.12)	$ (2.45)
Diluted	$ (0.21)	$ (1.23)	$ (0.23)	$ (0.44)	$ 0.04	$ 0.01	$ (1.94)	$ (0.59)	$ (2.12)	$ (2.45)
Remeasurement of Deferred Tax Liability, or Naked Credit | As Reported
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Provision for income taxes										$ 2,688
Net loss										$ (12,326)
Net loss per share:
Basic										$ (2.62)
Diluted										$ (2.62)
Remeasurement of Deferred Tax Liability, or Naked Credit | As Revised
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Provision for income taxes										$ 1,901
Net loss										$ (11,539)
Net loss per share:
Basic										$ (2.45)
Diluted										$ (2.45)