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Note 13 - Segments - Schedule of Segment Reporting (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Rental income $ 16,470,918 $ 18,523,813
Fees and other income 343,790 401,462
Total revenue 16,814,708 18,925,275
Rental operating costs 6,158,052 6,256,077
General and administrative 5,704,830 7,526,675
Depreciation and amortization 4,862,267 5,515,518
Asset Impairment Charges 6,443,437 1,969,311
Total costs and expenses 23,168,586 21,267,581
Interest and other income, net 20,881 (151,356)
Net loss in Conduit Pharmaceuticals marketable securities (see footnote 9) (188,287) (17,925,723)
Gain on sales of real estate, net 5,444,792 3,426,572
Income tax (expense) benefit (463,170) (60,855)
Total other income, net (1,236,221) (20,761,558)
Net loss: (7,590,099) (23,103,864)
Less: Income attributable to noncontrolling interests (685,586) (2,524,665)
Net loss attributable to Presidio Property Trust, Inc. stockholders (8,275,685) (25,628,529)
Mortgage Notes [Member]    
Interest expense - mortgage notes (6,050,437) (6,050,196)
Operating Segments [Member] | Retail Properties [Member]    
Rental income 543,600 2,058,622
Fees and other income 400 62,041
Total revenue 544,000 2,120,663
Rental operating costs 115,047 608,667
General and administrative 0 0
Depreciation and amortization 100,472 394,461
Asset Impairment Charges 0 0
Total costs and expenses 215,519 1,003,128
Interest and other income, net 0 0
Net loss in Conduit Pharmaceuticals marketable securities (see footnote 9) 0 0
Gain on sales of real estate, net 4,494,358 0
Income tax (expense) benefit 0 0
Total other income, net 4,217,397 (577,761)
Net loss: 4,545,878 539,774
Less: Income attributable to noncontrolling interests 0 0
Net loss attributable to Presidio Property Trust, Inc. stockholders 4,545,878 539,774
Operating Segments [Member] | Retail Properties [Member] | Mortgage Notes [Member]    
Interest expense - mortgage notes (276,961) (577,761)
Operating Segments [Member] | Office/Industrial Properties [Member]    
Rental income 11,975,156 12,097,022
Fees and other income 257,414 241,530
Total revenue 12,232,570 12,338,552
Rental operating costs 6,423,862 6,136,564
General and administrative 19,195 2,330
Depreciation and amortization 3,910,547 4,154,769
Asset Impairment Charges 6,031,828 1,377,937
Total costs and expenses 16,385,432 11,671,600
Interest and other income, net 0 (171,734)
Net loss in Conduit Pharmaceuticals marketable securities (see footnote 9) 0 0
Gain on sales of real estate, net 0 0
Income tax (expense) benefit (9,600) 0
Total other income, net (3,766,928) (3,629,094)
Net loss: (7,919,790) (2,962,142)
Less: Income attributable to noncontrolling interests (47,710) (86,686)
Net loss attributable to Presidio Property Trust, Inc. stockholders (7,967,500) (3,048,828)
Operating Segments [Member] | Office/Industrial Properties [Member] | Mortgage Notes [Member]    
Interest expense - mortgage notes (3,757,328) (3,457,360)
Operating Segments [Member] | Model Home Properties [Member]    
Rental income 3,952,162 4,368,169
Fees and other income 5,776 68,084
Total revenue 3,957,938 4,436,253
Rental operating costs 212,817 171,621
General and administrative 813,705 820,217
Depreciation and amortization 846,818 952,627
Asset Impairment Charges 339,609 406,374
Total costs and expenses 2,212,949 2,350,839
Interest and other income, net (13,735) (23,890)
Net loss in Conduit Pharmaceuticals marketable securities (see footnote 9) 0 0
Gain on sales of real estate, net 950,434 3,426,572
Income tax (expense) benefit (60,875) (55,543)
Total other income, net (1,134,967) 1,337,498
Net loss: 610,022 3,422,912
Less: Income attributable to noncontrolling interests (637,876) (2,437,979)
Net loss attributable to Presidio Property Trust, Inc. stockholders (27,854) 984,933
Operating Segments [Member] | Model Home Properties [Member] | Mortgage Notes [Member]    
Interest expense - mortgage notes (2,010,791) (2,009,641)
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]    
Rental income 0 0
Fees and other income 80,200 29,807
Total revenue 80,200 29,807
Rental operating costs (593,674) (660,775)
General and administrative 4,871,930 6,704,128
Depreciation and amortization 4,430 13,661
Asset Impairment Charges 72,000 185,000
Total costs and expenses 4,354,686 6,242,014
Interest and other income, net 34,616 44,268
Net loss in Conduit Pharmaceuticals marketable securities (see footnote 9) (188,287) (17,925,723)
Gain on sales of real estate, net 0 0
Income tax (expense) benefit (392,695) (5,312)
Total other income, net (551,723) (17,892,201)
Net loss: (4,826,209) (24,104,408)
Less: Income attributable to noncontrolling interests 0 0
Net loss attributable to Presidio Property Trust, Inc. stockholders (4,826,209) (24,104,408)
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | Mortgage Notes [Member]    
Interest expense - mortgage notes $ (5,357) $ (5,434)