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v3.23.2

Segmented Information - Additional Information (Detail) | 12 Months Ended
--- | ---
Mar. 25, 2023 Store Segment Location | Mar. 26, 2022 Store
Segment Information [Line Items] |  |
Number of reportable segments | Segment | 2 |
Birks Brand [Member] |  |
Segment Information [Line Items] |  |
Number of Stores Closed | 2 | 3
Number of Stores Opened | 0 |
Birks Brand [Member] | Retail Segment [Member] |  |
Segment Information [Line Items] |  |
Number of retail stores | 21 |
Brinkhaus Brand [Member] | Retail Segment [Member] |  |
Segment Information [Line Items] |  |
Number of retail locations | Location | 2 |

X
- Definition Number of retail locations. + References No definition available. + Details
Name: | bgi_NumberOfRetailLocations
Namespace Prefix: | bgi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of stores closed. + References No definition available. + Details
Name: | bgi_NumberOfStoresClosed
Namespace Prefix: | bgi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of stores opened . + References No definition available. + Details
Name: | bgi_NumberOfStoresOpened
Namespace Prefix: | bgi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Segment Information [Line Items] + References No definition available. + Details
Name: | bgi_SegmentInformationLineItems
Namespace Prefix: | bgi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8672-108599 + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of stores. + References No definition available. + Details
Name: | us-gaap_NumberOfStores
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_StatementGeographicalAxis=bgi_BirksBrandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=bgi_RetailSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=bgi_BrinkhausBrandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |