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Note 4 - Real Estate Assets - Summary of Properties Owned (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Real estate assets owned |  | $ 166,254 | $ 200,207
Garden Gateway Plaza [Member] |  |  |
Geographic location | [1] | Colorado Springs, Colorado |
Real estate assets owned | [1] | $ 11,465 | 11,428
World Plaza [Member] |  |  |
Geographic location | [1] | San Bernardino, California |
Real estate assets owned | [1] | $ 9,272 | 8,305
Executive Office Park [Member] |  |  |
Geographic location | [2] | Colorado Springs, Colorado |
Real estate assets owned | [2] | $ 5,106 | 7,723
Waterman Plaza [Member] |  |  |
Geographic location | [1] | San Bernardino, California |
Real estate assets owned | [1] | $ 3,500 | 4,889
Genesis Plaza [Member] |  |  |
Geographic location |  | San Diego, California |
Real estate assets owned |  | $ 8,651 | 8,789
Dakota Center [Member] |  |  |
Geographic location |  | Fargo, North Dakota |
Real estate assets owned |  | $ 8,597 | 8,855
Grand Pacific Center [Member] |  |  |
Geographic location |  | Bismarck, North Dakota |
Real estate assets owned |  | $ 5,684 | 5,914
Union Terrace [Member] |  |  |
Geographic location | [3] | Lakewood, CO |
Real estate assets owned | [3] | $ 0 | 8,425
Centennial Tech Center [Member] |  |  |
Geographic location | [3] | Colorado Springs, Colorado |
Real estate assets owned | [3] | $ 0 | 13,132
Arapahoe Center [Member] |  |  |
Geographic location |  | Centennial, Colorado |
Real estate assets owned |  | $ 9,233 | 9,748
Union Town Center [Member] |  |  |
Geographic location |  | Colorado Springs, Colorado |
Real estate assets owned |  | $ 9,345 | 9,612
West Fargo Industrial [Member] |  |  |
Geographic location |  | Fargo, North Dakota |
Real estate assets owned |  | $ 7,061 | 7,212
The 300 N.P [Member] |  |  |
Geographic location |  | Fargo, North Dakota |
Real estate assets owned |  | $ 3,280 | 3,405
Research Parkway [Member] |  |  |
Geographic location |  | Colorado Springs, Colorado |
Real estate assets owned |  | $ 2,438 | 2,512
One Park Centre [Member] |  |  |
Geographic location |  | Westminster, Colorado |
Real estate assets owned |  | $ 8,586 | 8,518
Highland Court [Member] |  |  |
Geographic location | [1] | Centennial, Colorado |
Real estate assets owned | [1] | $ 10,500 | 11,421
Shea Center II [Member] |  |  |
Geographic location |  | Highlands Ranch, Colorado |
Real estate assets owned |  | $ 21,026 | 21,853
Presidio Property Trust, Inc. Properties [Member] |  |  |
Real estate assets owned |  | 123,744 | 151,741
Model Home Properties [Member] |  |  |
Real estate assets owned | [4] | $ 42,510 | $ 48,466
[1] | Property held for sale as of December 31, 2020.
[2] | One of four buildings within this property was sold as of December 31, 2020.
[3] | This property was sold during the year ended December 31, 2020.
[4] | Includes seven Model Homes that are listed as held for sale as of December 31, 2020.

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