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FAIR VALUE MEASUREMENTS (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Mortgage Notes Payable    
Carrying Amount $ 251,953,066 $ 252,370,843
Estimated Fair Value 235,100,502 233,362,501
Partially owned properties    
Mortgage Notes Payable    
Carrying Amount 166,471,296 166,492,692
Estimated Fair Value $ 163,347,932 $ 160,956,055