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Segments (Capital Expenditures) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Abstract]    
Acquisition of operating properties $ 23,667,535 $ 67,852,592
Capital expenditures and tenant improvements 4,150,213 2,854,939
Acquisition of retail properties   2,908,176
Total real estate investments 27,817,748 70,707,531
Industrial Office Properties [Member]    
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Abstract]    
Acquisition of operating properties   59,223,876
Capital expenditures and tenant improvements 4,092,875 2,800,100
Residential Properties [Member]    
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Abstract]    
Acquisition of operating properties 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 $ 57,338 $ 54,839