Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	Jul. 31, 2021	Aug. 01, 2020	Jan. 30, 2021
Income Taxes [Line Items]
Provision for income taxes	$ 426,000	$ 24,000	$ 454,000	$ 44,000
U.S. federal corporate tax rate			21.00%
Federal net operating loss carry forwards expiration period minimum					2022
Federal net operating loss carry forwards expiration period maximum					2037
Federal
Income Taxes [Line Items]
Net operating loss carryforwards subject to expiration					$ 158,200,000
Net operating loss carryforwards not subject to expiration					43,100,000
State and Local Jurisdiction
Income Taxes [Line Items]
Net operating loss carryforwards					$ 111,300,000
State and Local Jurisdiction | Minimum
Income Taxes [Line Items]
Net operating loss carryforwards expiration year					2021
State and Local Jurisdiction | Maximum
Income Taxes [Line Items]
Net operating loss carryforwards expiration year					2041