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Benefit Plans and Stock-Based Compensation - Summary of Birks' Restricted Stock Units And Deferred Share Units (Detail) - shares | 12 Months Ended
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Mar. 27, 2021 | Mar. 28, 2020 | Mar. 30, 2019
Deferred Stock Units Dsu [Member] |  |  |
Schedule Restricted Stock Options And Deferred Stock Units Line Items [Line Items] |  |  |
Beginning balance | 465,134 | 257,005 | 130,410
Grants of new units | 223,878 | 244,844 | 133,588
Forfeited |  | (36,715) | (6,993)
Ending balance | 689,012 | 465,134 | 257,005
Restricted Stock Units (RSUs) [Member] |  |  |
Schedule Restricted Stock Options And Deferred Stock Units Line Items [Line Items] |  |  |
Beginning balance | 0 | 102,000 | 112,000
Grants of new units | 375,000 |  |
Settled in cash |  | (102,000) | (5,500)
Forfeited |  |  | (4,500)
Ending balance | 375,000 | 0 | 102,000

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- Definition Share based compensation arrangement by share based payment award other than options settled in cash- + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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