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Segments, Assets (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting, Asset Reconciling Item [Line Items]      
Land, buildings and improvements, net $ 159,455,162 $ 165,638,719  
Cash and cash equivalents 10,207,001 10,746,536 4,872,081
Other assets, net 6,678,669 4,610,507  
Total Assets 181,245,382 185,131,993  
Industrial Office Properties [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Land, buildings and improvements, net 84,458,209 [1] 86,695,553 [1]  
Total Assets 89,813,764 [2] 90,286,093 [2]  
Residential Properties [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Land, buildings and improvements, net 23,093,296 [1] 29,399,405 [1]  
Total Assets 25,434,100 [2] 31,869,016 [2]  
Retail Properties [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Land, buildings and improvements, net 21,931,330 [1] 22,613,528 [1]  
Total Assets 23,354,122 [2] 23,913,305 [2]  
Self Storage Properties [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Land, buildings and improvements, net 29,972,327 [1] 26,930,233 [1]  
Total Assets 31,028,008 [2] 27,384,412 [2]  
Reportable Segments [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total Assets 169,629,994 173,452,826  
Significant Reconciling Items [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Cash and cash equivalents 10,207,001 10,746,536  
Other assets, net $ 1,408,387 $ 932,631  
[1] Includes lease intangibles and the land purchase option related to property acquisitions.
[2] Includes land, buildings and improvements, current receivables, deferred rent receivables and deferred leasing costs and other related intangible assets, all shown on a net basis.