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v3.25.4

Trade and other payables (Details Narrative) | 12 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Trade And Other Payables |  |
Trade payable, maturity | 30 to 90 days terms | 30 to 90 days

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

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- Definition Trade payables maturity. + References No definition available. + Details
Name: | BMGL_TradePayablesMaturity
Namespace Prefix: | BMGL_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration