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NET CAPITAL REQUIREMENTS (Details) | Mar. 31, 2026 item
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NET CAPITAL REQUIREMENTS |
Number of registered broker dealers | 4

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- Definition The number of registered broker dealers in operation. + References No definition available. + Details
Name: | bcg_NumberOfRegisteredBrokerDealers
Namespace Prefix: | bcg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_BankingAndThriftOtherDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration