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Mortgage Payable and Other Secured Financing - Contractual Maturities of Mortgages Payable and Other Secured Financing (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Mortgage Loans on Real Estate [Line Items]    
Total mortgages payable and other secured financings, net $ 26,802,246 $ 27,454,375
Mortgages Payable and Other Secured Financing [Member]    
Mortgage Loans on Real Estate [Line Items]    
2020 26,812,851  
Total 26,812,851  
Unamortized deferred financing costs (10,605)  
Total mortgages payable and other secured financings, net $ 26,802,246