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Commitments and Contingencies (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
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