Quarterly report pursuant to sections 13 or 15(d)

Mortgage Loans Payable - Summary of Mortgage Loans Payable (Detail)

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Mortgage Loans Payable - Summary of Mortgage Loans Payable (Detail) (USD $)
Sep. 30, 2012
Dec. 31, 2011
Participating Mortgage Loans [Line Items]    
Mortgage term loan $ 11,953,896 $ 12,136,083
Subsidiaries [Member]
   
Participating Mortgage Loans [Line Items]    
Mortgage term loan 13,287,370 13,457,247
Lumber River Plaza [Member] | Subsidiaries [Member]
   
Participating Mortgage Loans [Line Items]    
Mortgage term loan 3,003,739 3,038,979
Perimeter Square [Member] | Subsidiaries [Member]
   
Participating Mortgage Loans [Line Items]    
Mortgage term loan 4,335,627 4,376,033
Shoppes At Tj Maxx [Member] | Subsidiaries [Member]
   
Participating Mortgage Loans [Line Items]    
Mortgage term loan 5,948,004 6,042,235
Shoppes at Eagle Harbor [Member]
   
Participating Mortgage Loans [Line Items]    
Mortgage term loan 3,935,688 4,024,629
Monarch Bank Building [Member]
   
Participating Mortgage Loans [Line Items]    
Mortgage term loan 2,044,462 2,044,462
Amscot Building [Member]
   
Participating Mortgage Loans [Line Items]    
Mortgage term loan 323,193 348,171
Riversedge North [Member]
   
Participating Mortgage Loans [Line Items]    
Mortgage term loan 2,106,890 2,131,678
Walnut Hill Plaza [Member]
   
Participating Mortgage Loans [Line Items]    
Mortgage term loan $ 3,543,663 $ 3,587,143