Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Summary of Total Revenue and Earnings Recognized on Properties Acquired (Detail)

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Real Estate and Intangible Assets - Summary of Total Revenue and Earnings Recognized on Properties Acquired (Detail) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Real Estate Properties [Line Items]        
Rental Revenue $ 996,096 $ 848,461 $ 2,860,435 $ 2,473,837
2012 New Real Estate Activity [Member] | Colding Loop [Member]
       
Real Estate Properties [Line Items]        
Acquisition Date       Aug. 09, 2012
Rental Revenue       24,007
Earnings       5,838
2012 New Real Estate Activity [Member] | Trapnell Road [Member]
       
Real Estate Properties [Line Items]        
Acquisition Date       Sep. 12, 2012
Rental Revenue       12,554
Earnings       $ 6,192