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Voyage Expenses and Vessel Operating Expenses - Voyage Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Voyage Expenses and Vessel Operating Expenses [Abstract]
Voyage expenses decreased	$ 668	$ 540	$ 317

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- Definition

The increase (decrease) during the reporting period in expenses arising from rendering of services.

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

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