Note 4 - Real Estate Assets - Summary of Properties Owned (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Real estate assets owned	$ 173,952
Garden Gateway Plaza [Member]
Geographic location	Colorado Springs, Colorado	[1]
Real estate assets owned	$ 11,439	[1]
World Plaza [Member]
Geographic location	San Bernardino, California	[1]
Real estate assets owned	$ 9,272	[1]
Executive Office Park [Member]
Geographic location	Colorado Springs, Colorado	[2]
Real estate assets owned	$ 7,581	[2]
Waterman Plaza [Member]
Geographic location	San Bernardino, California	[1]
Real estate assets owned	$ 3,986	[1]
Genesis Plaza [Member]
Geographic location	San Diego, California
Real estate assets owned	$ 8,816
Dakota Center [Member]
Geographic location	Fargo, North Dakota
Real estate assets owned	$ 8,655
Grand Pacific Center [Member]
Geographic location	Bismarck, North Dakota
Real estate assets owned	$ 5,754
Arapahoe Center [Member]
Geographic location	Centennial, Colorado
Real estate assets owned	$ 9,362
Union Town Center [Member]
Geographic location	Colorado Springs, Colorado
Real estate assets owned	$ 9,414
West Fargo Industrial [Member]
Geographic location	West Fargo, North Dakota
Real estate assets owned	$ 7,079
The 300 N.P [Member]
Geographic location	Fargo, North Dakota
Real estate assets owned	$ 3,308
Research Parkway [Member]
Geographic location	Colorado Springs, Colorado
Real estate assets owned	$ 2,454
One Park Centre [Member]
Geographic location	Westminster, Colorado
Real estate assets owned	$ 8,701
Highland Court [Member]
Geographic location	Centennial, Colorado
Real estate assets owned	$ 10,992
Shea Center II [Member]
Geographic location	Highlands Ranch, Colorado
Real estate assets owned	$ 21,193
Presidio Property Trust, Inc. Properties [Member]
Real estate assets owned	128,006
Model Home Properties [Member]
Real estate assets owned	$ 45,946	[3]

[1] Properties held for sale as of September 30, 2020.

[2] This property comprises four buildings, one of which is held for sale as of September 30, 2020

[3] Includes one Model Home listed as held for sale as of September 30, 2020.