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Transactions with Related Parties (Details Narrative) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 EUR (€)
Disclosure of transactions between related parties [line items]
Annual Service Fee | $	$ 80
F.G. Europe [member]
Disclosure of transactions between related parties [line items]
Monthly Rental Expense | €		€ 26,000
Lease expiration date	Aug. 04, 2024	Aug. 04, 2024

X

- Definition

Date which lease or group of leases is set to expire, in YYYY-MM format.

+ References

No definition available.

+ Details

Name:	glbs_LeaseExpirationDate
Namespace Prefix:	glbs_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of monthly expense recognised on rental activities.

+ References

No definition available.

+ Details

Name:	glbs_MonthlyRentalExpense
Namespace Prefix:	glbs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Noninterest expense related to directors' fees which are fees paid by an Entity to its directors. Directors' fees may be paid in addition to salary and other benefits.

+ References

No definition available.

+ Details

Name:	glbs_NoninterestExpenseDirectorsFees1
Namespace Prefix:	glbs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_CounterpartiesAxis=glbs_FGEuropeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: