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INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Mortgage Maturities) (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	May 31, 2018	Sep. 12, 2016
Annual maturities of mortgage debt
2024	$ 3,295,000
2025	3,639,000
2026	25,267,000
2027	3,268,000
2028	22,846,000
Thereafter	353,812,000
Total	412,127,000
Less: unamortized deferred financing costs	(2,874,000)
Secured Debt	$ 409,253,129	$ 410,966,199
Weighted average interest rate (as a percent)	4.23%
Effective interest rate (as a percent)	4.29%
Investment Properties
Annual maturities of mortgage debt
2024	$ 17,137,577
2025	10,246,936
2026	256,664
2027	266,775
2028	132,533,358
Thereafter	6,000,000
Total	166,441,310
Less: unamortized deferred financing costs	(440,620)
Secured Debt	166,000,690		$ 166,119,958
Hamilton Essex 81
Annual maturities of mortgage debt
2025	10,000,000
Total	10,000,000
Less: unamortized deferred financing costs	(27,578)
Secured Debt	9,972,422		9,958,633
345 Franklin
Annual maturities of mortgage debt
2024	237,577
2025	246,936
2026	256,664
2027	266,775
2028	7,533,358
Total	8,541,310
Less: unamortized deferred financing costs	(31,627)
Secured Debt	8,509,683		8,731,598
Hamilton Minuteman
Annual maturities of mortgage debt
Thereafter	6,000,000
Total	6,000,000
Less: unamortized deferred financing costs	(65,127)				$ (123,000)
Secured Debt	5,934,873		5,926,689
Hamilton on Main Apts
Annual maturities of mortgage debt
2024	16,900,000
Total	16,900,000
Less: unamortized deferred financing costs	(14,714)
Secured Debt	16,885,286		16,869,235
Dexter Park
Annual maturities of mortgage debt
2028	125,000,000
Total	125,000,000
Less: unamortized deferred financing costs	(301,574)
Secured Debt	$ 124,698,426		$ 124,633,803	$ 82,000,000