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Segments (Capital Expenditures) (Detail) - USD ($) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2015
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Abstract] |  |  |  |
Acquisition of retail properties |  |  |  | $ 2,908,176
Acquisition of operating properties, net | $ 16,810,985 | $ 15,774,855 | $ 23,667,535 | 67,852,592
Capital expenditures and tenant improvements | 3,156,986 | 3,713,626 | 4,150,213 | 2,854,939
Total real estate investments | 19,967,971 | 19,488,481 | 27,817,748 | 70,707,531
Office/Industrial Properties [Member] |  |  |  |
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Abstract] |  |  |  |
Acquisition of operating properties, net |  |  |  | 59,223,876
Capital expenditures and tenant improvements | 3,115,489 | 3,629,586 | 4,092,875 | 2,800,100
Residential Properties [Member] |  |  |  |
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Abstract] |  |  |  |
Acquisition of operating properties, net | 16,810,985 | 15,774,855 | 23,667,535 | 5,720,540
Retail Properties [Member] |  |  |  |
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Abstract] |  |  |  |
Capital expenditures and tenant improvements | $ 41,497 | $ 84,040 | $ 57,338 | $ 54,839

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- Definition Acquisition Of Retail Properties + References No definition available. + Details
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- Definition The total of additions to real estate and lease intangibles + References No definition available. + Details
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- Definition Reconciliation of other significant reconciling items from segments to consolidated. + References No definition available. + Details
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- 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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- 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Details
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- Details
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- Details
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