REAL ESTATE ASSETS (Summary of Properties Owned) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Real Estate Assets Owned	$ 179,192
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	$ 11,440
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	$ 8,334
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	$ 7,654
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	$ 4,867
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	$ 8,721
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	$ 8,772
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	$ 5,885
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	$ 9,619
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	$ 9,552
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	$ 7,188
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	$ 3,371
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	$ 2,492
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	$ 8,898
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	$ 11,260
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	$ 21,706
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	129,759
Model Home properties
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation [Line Items]
Real Estate Assets Owned	$ 49,433