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REAL ESTATE ASSETS(Summary of Properties Owned) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Real Estate Assets Owned	$ 195,563
Garden Gateway Plaza
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	Colorado Springs, Colorado
Real Estate Assets Owned	$ 11,215
World Plaza
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	San Bernardino, California
Real Estate Assets Owned	$ 8,295
Executive Office Park
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	Colorado Springs, Colorado
Real Estate Assets Owned	$ 7,787
Waterman Plaza
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	San Bernardino, California
Real Estate Assets Owned	$ 4,911
Genesis Plaza
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	San Diego, California
Real Estate Assets Owned	$ 8,902
Dakota Center
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	Fargo, North Dakota
Real Estate Assets Owned	$ 8,861
Grand Pacific Center
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	Bismarck, North Dakota
Real Estate Assets Owned	$ 5,899
Union Terrace
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	Lakewood, Colorado
Real Estate Assets Owned	$ 8,257
Centennial Tech Center
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	Colorado Springs, Colorado
Real Estate Assets Owned	$ 12,837
Arapahoe Center
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	Centennial, Colorado
Real Estate Assets Owned	$ 9,877
Union Town Center
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	Colorado Springs, Colorado
Real Estate Assets Owned	$ 9,688
West Fargo Industrial
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	West Fargo, North Dakota
Real Estate Assets Owned	$ 7,229
300 N.P.
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	Fargo, North Dakota
Real Estate Assets Owned	$ 3,440
Research Parkway
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	Colorado Springs, Colorado
Real Estate Assets Owned	$ 2,531
One Park Center
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	Westminster, Colorado
Real Estate Assets Owned	$ 8,524
Highland Court
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	Centennial, Colorado
Real Estate Assets Owned	$ 11,493
Shea Center II
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Location	Highlands Ranch, Colorado
Real Estate Assets Owned	$ 22,022
Presidio Property Trust, Inc. properties
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Real Estate Assets Owned	151,768
Model Home properties
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Real Estate Assets Owned	$ 43,795

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