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Accounts Receivable and Other Receivables - Additional Information (Detail) - Non Accrual [Member] - USD ($) $ in Millions	12 Months Ended
	Mar. 29, 2025	Mar. 30, 2024
Accounts Receivables [Line Items]
Payment period of term loan	revolving lines of credit and/or installment plans under which the payment terms exceed one year
Credit card receivables	$ 1.1	$ 1.6

X

- Definition

Accounts Receivable Payment Terms

+ References

No definition available.

+ Details

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Namespace Prefix:	bgi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Accounts Receivables [Line Items]

+ References

No definition available.

+ Details

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Namespace Prefix:	bgi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amortized cost excluding accrued interest, after allowance for credit loss, of financing receivable classified as noncurrent. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: