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INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Mortgage Maturities) (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	May 31, 2018	Oct. 13, 2016
Annual maturities of mortgage debt
2021-current maturities	$ 2,443,000
2022	2,569,000
2023	102,651,000
2024	10,935,000
2025	3,260,000
Thereafter	163,475,000
Total	285,333,000
Less: unamortized deferred financing costs	(1,405,000)
Secured Debt	$ 283,927,890	$ 281,771,246
Weighted average interest rate (as a percent)	3.91%
Effective interest rate (as a percent)	3.98%
Investment Properties
Annual maturities of mortgage debt
2021-current maturities	$ 211,575
2022	219,910
2023	228,573
2024	17,137,577
2025	10,246,936
Thereafter	139,056,797
Total	167,101,368
Less: unamortized deferred financing costs	(768,536)
Secured Debt	166,332,832		$ 166,427,083
Hamilton Essex 81
Annual maturities of mortgage debt
2025	10,000,000
Total	10,000,000
Less: unamortized deferred financing costs	(68,945)
Secured Debt	9,931,055		9,917,266
345 Franklin
Annual maturities of mortgage debt
2021-current maturities	211,575
2022	219,910
2023	228,573
2024	237,577
2025	246,936
Thereafter	8,056,797
Total	9,201,368
Less: unamortized deferred financing costs	(51,602)
Secured Debt	9,149,766		9,346,663
Hamilton Minuteman
Annual maturities of mortgage debt
Thereafter	6,000,000
Total	6,000,000
Less: unamortized deferred financing costs	(89,678)				$ (123,000)
Secured Debt	5,910,322		5,902,139
Hamilton on Main Apts
Annual maturities of mortgage debt
2024	16,900,000
Total	16,900,000
Less: unamortized deferred financing costs	(62,868)
Secured Debt	16,837,132		16,821,081
Dexter Park
Annual maturities of mortgage debt
Thereafter	125,000,000
Total	125,000,000
Less: unamortized deferred financing costs	(495,443)
Secured Debt	$ 124,504,557		$ 124,439,934	$ 82,000,000

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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