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Concentration of Credit Risk - Additional Information (Detail)
 9 Months Ended
Sep. 30, 2015
USD ($)
Institution
Concentration Of Credit Risk [Line Items]  
Uninsured cash balance $ 1,776,272
Number of financial institutions in which cash is deposited | Institution 1
Project Term Loans [Member]  
Concentration Of Credit Risk [Line Items]  
Interest obligation from basis points variation, per month $ 6,510
Mortgages Payable [Member]  
Concentration Of Credit Risk [Line Items]  
Basis spread on variable rate, points 0.01%
Interest obligation from basis points variation, per month $ 812
Credit risk maturity period 2016-07
Term Loan [Member]  
Concentration Of Credit Risk [Line Items]  
Interest obligation from basis points variation, per month $ 2,527
Basis spread on variable rate, points 0.01%