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Note 4 - Real Estate Assets (Details Textual) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 ft² a | Dec. 31, 2016
Number of States Real Estate Property is Located | 4 |
Number of Limited Partnerships in which Company is Sole General Partner |  | 1
Number of Limited Liability Companies | 2 | 5
Number of Real Estate Properties Held for Sale | 1 |
NetREIT Palm Self-Storage LP [Member] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 61.30% |
Genesis Plaza [Member] |  |
Real Estate Property, Number of Tenants-in-common Owning the Property | 2 |
Percentage Beneficial Ownership in Property | 76.40% |
Genesis Plaza [Member] | Tenant-in-common One [Member] |  |
Percentage Ownership in Property | 57.00% |
Genesis Plaza [Member] | Tenant-in-common Two [Member] |  |
Percentage Ownership in Property | 43.00% |
Office/Industrial Properties [Member] |  |
Area of Real Estate Property (Square Foot) | a | 724,000 |
Office/Industrial Properties [Member] | Industrial Buildings [Member] |  |
Number of Real Estate Properties | 1 |
Office/Industrial Properties [Member] | Office Buildings [Member] |  |
Number of Real Estate Properties | 7 |
Retail Properties [Member] |  |
Number of Real Estate Properties | 4 |
Area of Real Estate Property (Square Foot) | 121,000 |
Model Home [Member] |  |
Number of Real Estate Properties | 85 |
Area of Real Estate Property (Square Foot) | 276,000 |
Number of Limited Partnerships in which Company is Sole General Partner | 6 |
Number of Limited Liability Companies | 1 |
Number of Real Estate Properties Held for Sale | 3 |
COLORADO |  |
Number of Real Estate Properties | 5 |
NORTH DAKOTA |  |
Number of Real Estate Properties | 4 |
SOUTH DAKOTA |  |
Number of Real Estate Properties | 2 |
TEXAS |  |
Number of Real Estate Properties | 1 |

X
- Definition Represents the number of limited liability companies. + References No definition available. + Details
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- Definition Represents the number of limited partnerships in which the Company is the sole general partner. + References No definition available. + Details
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- Definition The number of states in which real estate property is located. + References No definition available. + Details
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- Definition Represents the aggregate percentage ownership by the reporting entity in the specified property. + References No definition available. + Details
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- Definition Represents the percentage of the property owned. + References No definition available. + Details
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- Definition Area of a real estate property. + References No definition available. + Details
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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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