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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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Present value of lessee's discounted obligation for lease payments from 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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Commitments and Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 02, 2019	Nov. 03, 2018	Nov. 02, 2019	Nov. 03, 2018	Feb. 02, 2019
Commitments And Contingencies Disclosure [Abstract]
Operating lease cost excluding variable lease costs and sublease income	$ 100		$ 400
Lease expense recognized		$ 200		$ 600
Operating lease, Weighted-average remaining lease term	6 years 2 months 12 days		6 years 2 months 12 days
Operating lease, Weighted-average IBR	8.80%		8.80%
Operating lease, right-of-use asset	$ 4,200		$ 4,200
Remainder of Fiscal 2020	193		193
Fiscal 2021	890		890
Fiscal 2022	902		902
Fiscal 2023	884		884
Fiscal 2024	893		893
Thereafter	1,597		1,597
Total future minimum lease payments	5,359		5,359
Less imputed interest	(1,178)		(1,178)
Operating lease obligations	$ 4,181		$ 4,181
Fiscal 2020					$ 854
Fiscal 2021					865
Fiscal 2022					876
Fiscal 2023					857
Fiscal 2024					863
Thereafter					1,673
Total future minimum lease payments					$ 5,988