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Mortgage Payable and Other Secured Financing - Contractual Maturities of Mortgages Payable and Other Secured Financing (Details) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Mortgage Loans on Real Estate [Line Items]    
Total mortgages payable and other secured financings, net $ 25,860,469 $ 25,984,872
Mortgages Payable and Other Secured Financing [Member]    
Mortgage Loans on Real Estate [Line Items]    
Remainder of 2021 710,641  
2022 869,599  
2023 908,564  
2024 946,558  
2025 1,782,213  
Thereafter 20,644,450  
Total 25,862,025  
Unamortized deferred financing costs (1,556)  
Total mortgages payable and other secured financings, net $ 25,860,469