Leases - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019	Feb. 01, 2020
Lessee, Lease, Description [Line Items]
Payments for deferred rent	$ 0.5		$ 1.9
Lease modifications, rent abatements	1.9		7.7
Impairment loss	1.4	$ 0.3	6.0	$ 1.2
Accumulated amortization	1.4	$ 0.7	1.4	$ 0.7	$ 0.8
Lease not yet commenced, amount	$ 2.1		$ 2.1
Minimum
Lessee, Lease, Description [Line Items]
Deferred rent payment period			6 months
Maximum
Lessee, Lease, Description [Line Items]
Deferred rent payment period			18 months