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

X
- 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