Quarterly report pursuant to Section 13 or 15(d)

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

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Real Estate and Intangible Assets - Summary of Total Operating Revenues and Earnings Recognized on Properties Acquired (Detail) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Real Estate Properties [Line Items]      
Rental revenue $ 3,679,474 $ 2,622,327  
Parrish Road [Member]      
Real Estate Properties [Line Items]      
Rental revenue     $ 139,073
2015 New Real Estate Activity [Member]      
Real Estate Properties [Line Items]      
Rental revenue   200,432  
Earnings   $ 104,237  
2015 New Real Estate Activity [Member] | Espinosa Road [Member]      
Real Estate Properties [Line Items]      
Acquisition Date   Jan. 05, 2015  
Rental revenue   $ 186,216  
Earnings   $ 97,058  
2015 New Real Estate Activity [Member] | Parrish Road [Member]      
Real Estate Properties [Line Items]      
Acquisition Date   Mar. 10, 2015  
Rental revenue   $ 14,216  
Earnings   $ 7,179  
2016 New Real Estate Activity [Member] | Gunbarrel Road [Member]      
Real Estate Properties [Line Items]      
Acquisition Date Mar. 03, 2016    
Rental revenue $ 123,999    
Earnings $ 21,075