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Segments (Capital Expenditures) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Abstract]
Capital expenditures and tenant improvements	$ 3,359,283	$ 3,621,724
Acquisition of operating properties	17,326,915	17,560,745
Total real estate investments	20,686,198	21,182,469
Office/Industrial Properties [Member]
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Abstract]
Capital expenditures and tenant improvements	3,340,023	3,418,722
Model Home Properties [Member]
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Abstract]
Acquisition of operating properties	17,326,915	17,560,745
Retail/Mixed Use Properties [Member]
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Abstract]
Capital expenditures and tenant improvements	$ 19,260	$ 203,002

X

- Definition

The total of additions to real estate and lease intangibles

+ References

No definition available.

+ Details

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X

- Definition

Reconciliation of other significant reconciling items from segments to consolidated.

+ References

No definition available.

+ Details

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X

- Definition

Amount of cash outflow for the allowance granted to lessee and/or direct costs incurred by lessor used to prepare the leased premises for tenant's occupancy.

+ References

No definition available.

+ Details

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X

- Definition

The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

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