Income Taxes - Reconciliation of changes in unrecognized tax benefits (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 30, 2021	Feb. 01, 2020	Feb. 02, 2019
Reconciliation of changes in gross amount of unrecognized tax benefits
Balance of unrecognized tax benefits at beginning of year	$ 1,212	$ 975	$ 335
Increase related to prior period tax positions	303		206
Decrease related to prior period tax positions	(1)	(27)
Increase related to current period tax positions	3,960	287	440
Decrease related to lapse of statute of limitations	(213)	(23)	(6)
Balance of unrecognized tax benefits at end of year	5,261	1,212	975
Expected decrease in gross unrecognized tax benefits in 2021	3,000
Maximum
Reconciliation of changes in gross amount of unrecognized tax benefits
Interest and penalties recognized associated with unrecognized tax positions	$ 1,000	$ 1,000	$ 1,000

Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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