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v3.21.1

Note 4 - Real Estate Assets (Details Textual) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 ft² | Dec. 31, 2016 | Mar. 31, 2020
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 | 4 |
Number of Real Estate Properties Held for Sale | 3 |  |
Model Home [Member] |  |  |
Number of Real Estate Properties | 0 |  | 10
Number of Real Estate Properties Held for Sale | 16 |  |
Office/Industrial Properties [Member] |  |  |
Area of Real Estate Property (Square Foot) | 867,744 |  |
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 | 9 |  |
Retail Properties [Member] |  |  |
Number of Real Estate Properties | 3 |  |
Area of Real Estate Property (Square Foot) | 110,552 |  |
Model Home [Member] |  |  |
Number of Real Estate Properties | 106 |  |
Number of Limited Partnerships in which Company is Sole General Partner | 6 |  |
Number of Limited Liability Companies | 1 |  |
NORTH DAKOTA |  |  |
Number of Real Estate Properties | 4 |  |
SOUTH DAKOTA |  |  |
Number of Real Estate Properties | 2 |  |

X
- Definition Represents the number of limited liability companies. + References No definition available. + Details
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X
- 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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- Details
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