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Net Revenue - Trade Sale Revenue (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Trade sales receivable	$ 1,752,566		$ 1,564,054
Trade sales payable	806,640		$ 806,162
Trade sales revenue	$ 1,380,842	$ 1,372,573

X

- Definition

Trade sales payable.

+ References

No definition available.

+ Details

Name:	bbgi_TradeSalesPayable
Namespace Prefix:	bbgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Trade sales receivable.

+ References

No definition available.

+ Details

Name:	bbgi_TradeSalesReceivable
Namespace Prefix:	bbgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Trade sales revenue.

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration