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REAL ESTATE ASSETS (Summary of Properties Owned) (Details) - Jun. 30, 2020 $ in Thousands	property	USD ($)	building
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		$ 176,516
Model Home Properties
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		47,369
Garden Gateway Plaza
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		11,445
World Plaza
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		9,271
Executive Office Park
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		7,623
Buildings classified as held for sale | building			1
Total buildings held-for-sale	4		4
Waterman Plaza
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		4,000
Genesis Plaza
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		8,947
Dakota Center
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		8,724
Grand Pacific Center
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		5,823
Arapahoe Center
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		9,492
Union Town Center
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		9,482
West Fargo Industrial
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		7,136
300 N.P.
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		3,336
Research Parkway
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		2,473
One Park Center
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		8,789
Highland Court
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		11,136
Shea Center II
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		21,470
Subtotal, Presidio Property Trust, Inc. Properties
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Total real estate assets and lease intangibles, net		$ 129,147

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