Annual report pursuant to Section 13 and 15(d)

Real Estate and Lease Intangibles - Summary of Future Lease Expirations by Year for Properties (Parenthetical) (Detail)

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Real Estate and Lease Intangibles - Summary of Future Lease Expirations by Year for Properties (Parenthetical) (Detail) - USD ($)
12 Months Ended
Feb. 10, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Property Subject to or Available for Operating Lease [Line Items]        
Rental revenue $ 73,749 $ 11,888,091 $ 7,170,318 $ 4,027,687
2016 [Member]        
Property Subject to or Available for Operating Lease [Line Items]        
Rental revenue   816,811    
2016 [Member] | Surface Area Lease Property [Member]        
Property Subject to or Available for Operating Lease [Line Items]        
Rental revenue   32,064    
2016 [Member] | Residential Lease Property [Member]        
Property Subject to or Available for Operating Lease [Line Items]        
Rental revenue   $ 0