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Real Estate Assets (Summary of Properties Owned) (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 USD ($)
Real Estate And Accumulated Depreciation [Line Items] |  |
Real Estate Assets Owned | $ 202,206 |
Garden Gateway Plaza [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Mar. 01, 2007 |
Location | Colorado Springs, Colorado |
Real Estate Assets Owned | $ 11,362 |
World Plaza [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Sep. 01, 2007 | [1]
Location | San Bernardino, California | [1]
Real Estate Assets Owned | $ 7,310 | [1]
Executive Office Park [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Jul. 01, 2008 |
Location | Colorado Springs, Colorado |
Real Estate Assets Owned | $ 7,914 |
Waterman Plaza [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Aug. 01, 2008 |
Location | San Bernardino, California |
Real Estate Assets Owned | $ 4,955 |
Genesis Plaza [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Aug. 01, 2010 |
Location | San Diego, California |
Real Estate Assets Owned | $ 8,683 |
Dakota Center [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | May 01, 2011 |
Location | Fargo, North Dakota |
Real Estate Assets Owned | $ 9,036 |
The Presidio [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Nov. 01, 2012 | [1]
Location | Colorado Springs, Colorado | [1]
Real Estate Assets Owned | $ 6,509 | [1]
Grand Pacific Center [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Mar. 01, 2014 |
Location | Bismarck, North Dakota |
Real Estate Assets Owned | $ 5,846 |
Union Terrace [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Aug. 01, 2014 | [1]
Location | Lakewood, Colorado | [1]
Real Estate Assets Owned | $ 8,076 | [1]
Centennial Tech Center [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Dec. 01, 2014 | [1]
Location | Colorado Springs, Colorado | [1]
Real Estate Assets Owned | $ 12,826 | [1]
Arapahoe Center [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Dec. 01, 2014 |
Location | Centennial, Colorado |
Real Estate Assets Owned | $ 10,122 |
Union Town Center [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Dec. 01, 2014 |
Location | Colorado Springs, Colorado |
Real Estate Assets Owned | $ 9,826 |
West Fargo Industrial [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Aug. 01, 2015 |
Location | West Fargo, North Dakota |
Real Estate Assets Owned | $ 7,285 |
300 N.P. [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Aug. 01, 2015 |
Location | Fargo, North Dakota |
Real Estate Assets Owned | $ 3,509 |
Research Parkway [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Aug. 01, 2015 |
Location | Colorado Springs, Colorado |
Real Estate Assets Owned | $ 2,567 |
One Park Centre [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Aug. 01, 2015 |
Location | Westminster, Colorado |
Real Estate Assets Owned | $ 8,508 |
Highland Court [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Aug. 01, 2015 |
Location | Centennial, Colorado |
Real Estate Assets Owned | $ 11,724 |
Shea Center II [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Dec. 01, 2015 |
Location | Highlands Ranch, Colorado |
Real Estate Assets Owned | $ 22,524 |
Presidio Property Trust, Inc Properties [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Real Estate Assets Owned | 158,582 |
Model Home Properties [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Real Estate Assets Owned | $ 43,624 |
Model Home Properties [Member] | Minimum [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Jan. 01, 2010 |
Model Home Properties [Member] | Maximum [Member] |  |
Real Estate And Accumulated Depreciation [Line Items] |  |
Date acquired | Jan. 01, 2018 |
[1] | Properties held for sale as of March 31, 2019.

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