{"cik":1031235,"taxonomy":"us-gaap","tag":"LesseeOperatingLeaseLiabilityPaymentsDue","label":"Lessee, Operating Lease, Liability, to be Paid","description":"Amount of lessee's undiscounted obligation for lease payment for operating lease.","entityName":"GLOBAL SELF STORAGE, INC.","units":{"USD":[{"end":"2025-12-31","val":56915,"accn":"0001193125-26-124051","fy":2025,"fp":"FY","form":"10-K","filed":"2026-03-25","frame":"CY2025Q4I"},{"end":"2026-03-31","val":51407,"accn":"0001193125-26-214568","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-08","frame":"CY2026Q1I"},{"end":"2026-06-30","val":45899,"accn":"0001193125-26-340205","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-07","frame":"CY2026Q2I"}]}}