Vessels, net - Consolidated Statement of Comprehensive Income/ (loss) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disclosure of detailed information about property, plant and equipment [abstract]
Vessels` depreciation	$ 1,248	$ 1,128	$ 2,443	$ 2,315
Depreciation on office furniture and equipment	9	12	17	22
Depreciation of right of use asset	78	78	156	156
Total	$ 1,335	$ 1,218	$ 2,616	$ 2,493

The amount of depreciation of office furniture and equipment.

No definition available.

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