XML 40 R29.htm IDEA: XBRL DOCUMENT v3.10.0.1

Revenue - Trade Sale Revenue (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Trade sales receivable	$ 1,475,097		$ 1,475,097		$ 1,550,172
Trade sales payable	1,423,413		1,423,413		$ 1,276,170
Trade sales revenue	$ 1,736,658	$ 2,126,125	$ 3,619,088	$ 4,772,553

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

Total revenue recognized from advertising barter transactions for each income statement presented.

+ References

No definition available.

+ Details

Name:	us-gaap_AdvertisingBarterTransactionsAdvertisingBarterRevenue
Namespace Prefix:	us-gaap_
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