Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Future Operating Lease Payments from Tenants under Non-Cancelable Leases (Detail)

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Real Estate and Intangible Assets - Future Operating Lease Payments from Tenants under Non-Cancelable Leases (Detail) (USD $)
Mar. 31, 2015
Real Estate [Abstract]  
Tenant Lease Payments, For the remaining nine months ending December 31, 2015 $ 5,977,677us-gaap_OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear
Tenant Lease Payments, For the fiscal years ending December 31: 2016 9,188,301us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
Tenant Lease Payments, 2017 8,122,043us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
Tenant Lease Payments, 2018 7,525,864us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
Tenant Lease Payments, 2019 7,579,161us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
Tenant Lease Payments, 2020 6,322,196us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Tenant Lease Payments, Thereafter 15,653,602us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Tenant Lease Payments, Total $ 60,368,844us-gaap_OperatingLeasesFutureMinimumPaymentsDue