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FAIR VALUE MEASUREMENTS (Details) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Mortgage Notes Payable    
Carrying Amount $ 251,505,292 $ 252,370,843
Estimated Fair Value 264,498,972 233,362,501
Partially owned properties    
Mortgage Notes Payable    
Carrying Amount 166,427,083 166,492,692
Estimated Fair Value $ 172,767,267 $ 160,956,055