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Retirement Plan and Employee Stock Purchase Plan - Additional Information (Detail) - USD ($) | 12 Months Ended
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Feb. 02, 2019 | Feb. 03, 2018 | Jan. 28, 2017
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employee contribution percentage | 3.00% |  |
Years of age attained | 20 years 6 months |  |
Compensation expense | $ 12,100,000 | $ 10,600,000 | $ 9,800,000
First 3 Percent of Each Participant's Contributions |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Matching contribution to defined contribution plan | 100.00% |  |
Next 3 Percent of Each Participant's Contributions |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Matching contribution to defined contribution plan | 25.00% |  |
Full-time employees |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Periods of service to be eligible | 60 days |  |
Part-time employees |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Periods of service to be eligible | 1000 hours |  |
Defined Contribution Pension Plan 401k | Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employee contribution percentage | 50.00% |  |
Employee Stock Purchase Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Periods of service to be eligible | 60 days |  |
Employee Stock Purchase Plan | Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Matching investment per pay period | $ 100 |  |
Employee Stock Purchase Plan | Minimum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Qualifying age | 18 years |  |
Matching percent of investment | 15.00% |  |

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