Commitments and Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended
May 02, 2020	May 04, 2019
Commitments And Contingencies Disclosure [Abstract]
Operating lease cost excluding variable lease costs and sublease income	$ 100	$ 200
Operating lease, Weighted-average remaining lease term	4 years 4 months 24 days
Operating lease, Weighted-average IBR	8.80%
Operating lease, right-of-use asset	$ 1,500
Remainder of Fiscal 2021	323
Fiscal 2022	442
Fiscal 2023	425
Fiscal 2024	434
Fiscal 2025	333
Total future minimum lease payments	1,957
Less imputed interest	(345)
Present value of operating lease liabilities	$ 1,612

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Amount of lessee's undiscounted obligation for lease payments for operating lease.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fifth fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in fourth fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due in second fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease having an initial or remaining lease term in excess of one year due in remainder of fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of lessee's right to use underlying asset under operating lease.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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