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Income Taxes - Summary of Taxes Paid (Refunded) (Parenthetical) (Detail) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Nov. 01, 2020 USD ($) | Aug. 02, 2020 USD ($) | Nov. 01, 2020 USD ($) Installment
Income Tax Disclosure [Abstract] |  |  |
United States Federal - Alternative Minimum Tax (AMT) credit refunds |  |  | $ 1,500,000
Number of separate installments | Installment |  |  | 2
AMT credit carryforward remaining refundable balance amount received | $ 764,000 | $ 746,000 |

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