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Commitments and Contingencies (Details) - USD ($) | Dec. 31, 2024 | Dec. 31, 2023
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Commitments and Contingencies |  |
Provision for financial receivable unfunded credit losses | $ 584,000 | $ 473,000

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- Definition Aggregate amount of credit losses from transactions related to unfunded commitments for financial instruments + References No definition available. + Details
Name: | glbz_ProvisionForFinancialReceivableUnfundedCreditLosses
Namespace Prefix: | glbz_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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