Debt conversion, payment for converting instrument.

No definition available.

Name:	bbgi_DebtConversionPaymentForConvertingInstrument
Namespace Prefix:	bbgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Debt instrument, purchase price, percentage.

+ References

No definition available.

+ Details

Name:	bbgi_DebtInstrumentPurchasePricePercentage
Namespace Prefix:	bbgi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument redeemed percentage.

+ References

No definition available.

+ Details

Name:	bbgi_DebtInstrumentRedeemedPercentage
Namespace Prefix:	bbgi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Proceeds from the new notes.

+ References

No definition available.

+ Details

Name:	bbgi_ProceedsFromTheNewNotes
Namespace Prefix:	bbgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Dividend or interest rate associated with the financial instrument issued in exchange for the original debt being converted in a noncash or part noncash transaction. Noncash are transactions that affect recognized assets or liabilities but that do not result in cash receipts or cash payments. Part noncash refers to that portion of the transaction not resulting in cash receipts or cash payments.

+ References

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-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

+ References

+ Details

Name:	us-gaap_DebtConversionConvertedInstrumentSharesIssued1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 55
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+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

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

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
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+ Details

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

- Definition

Amount of costs incurred to date for the specified restructuring cost.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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+ Details

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

- Definition

Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

+ References

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-Section 50
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-Publisher FASB
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

Name:	us-gaap_SharesIssuedPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

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Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=bbgi_PromissoryNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=bbgi_NinePointTwoZeroZeroPercentSeniorSecuredSecondLieuNotesDue2028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Subsequent Events - Additional Information (Details) - USD ($)		3 Months Ended
	Oct. 08, 2024	Jun. 30, 2023	Sep. 30, 2024
Subsequent Event [Line Items]
Proceeds from the new notes	$ 30,000,000
Debt restructuring costs			$ 3,500,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Debt conversion, payment for converting instrument	1,000,000
Promissory Note [Member]
Subsequent Event [Line Items]
Debt instrument, redeemed percentage		66.00%
Promissory Note [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Debt instrument face value	$ 194,700,000
Debt instrument, redeemed percentage	72.90%
Debt instrument, repurchase amount	$ 68,000,000
Debt instrument, purchase price, percentage	62.50%
Class A Common Stock [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Shares issued upon conversion of principal amount of existing notes	179,384
9.200% Senior Secured Second Lien Notes due on August 1, 2028 \| Subsequent Event [Member]
Subsequent Event [Line Items]
Debt instrument face value	$ 184,900,000
Debt instrument, interest rate, stated percentage	9.20%
Debt conversion, converted instrument, rate	95.00%
11.000% Senior Secured First Lien notes due 2028 \| Subsequent Event [Member]
Subsequent Event [Line Items]
Debt instrument face value	$ 30,900,000
Debt instrument, interest rate, stated percentage	11.00%
Stock Purchase Agreement [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Proceeds from issuance of common stock	$ 700,000
Stock Purchase Agreement [Member] \| Class A Common Stock [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Share issued	56,864
Shares issued price per share	$ 12.31