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Loan from a shareholder (Details) - EUR (€) | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
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Loan From a Shareholder [Abstract] |  |  |  |  |
Loan from a shareholder | € 20,000 |  |  |  |
Interest-free with repayment | € 0 | € 6,000 | € 7,000 | € 7,000 | € 20,000

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- Definition Amount of Interest free repayment. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Amount of loan from a shareholder. + References No definition available. + Details
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Namespace Prefix: | brer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration