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Summary of Significant Accounting Policies - Goodwill and Indefinite Lived Intangible Assets (Details) $ in Thousands	12 Months Ended
	Mar. 28, 2020 USD ($) store segment	Mar. 30, 2019 USD ($) store	Mar. 31, 2018 USD ($) store
Goodwill and Indefinite-Lived Intangible Assets
Number of reporting units | segment	2
Goodwill impairment	$ 0	$ 0	$ 0
Impairment of indefinite-lived intangible assets, excluding goodwill	0	0	0
Long-Lived Assets
Impairments of long lived assets	$ 191	$ 455	$ 83
Number of stores with asset impairment | store	1	3	2
Customer lists
Definite-Lived Intangible Assets
Useful life	5 years
Trademarks
Definite-Lived Intangible Assets
Useful life	3 years

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Represents the number of stores with impairment.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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