RENTAL PROPERTIES - Belmont Acquisition (Details)			9 Months Ended
	Jan. 28, 2026 USD ($) building	Jun. 18, 2025 USD ($) item	Sep. 30, 2026 USD ($)	Oct. 22, 2026 USD ($)	Dec. 31, 2025 USD ($)
RENTAL PROPERTIES
(Loss) on Sale of Real Estate			$ (150,963)
Subsequent Event
RENTAL PROPERTIES
Loan amount				$ 9,000,000
Belmont Massachusetts property
RENTAL PROPERTIES
Borrowings used for purchase of property		$ 40,000,000
Loan for purchase of property		67,500,000
Loan amount					$ 67,656,000
Interest rate (as a percent)					5.19%
Mixed use property
RENTAL PROPERTIES
Purchase price of real estate properties		172,000,000
Closing costs		$ 218,000
Mixed use property | Residential
RENTAL PROPERTIES
Number of units purchased		396
Mixed use property | Commercial
RENTAL PROPERTIES
Number of units purchased		3
Commercial property
RENTAL PROPERTIES
Purchase price of real estate properties		$ 3,000,000
Commercial property | Commercial
RENTAL PROPERTIES
Number of real estate properties purchased | item		2
Commercial property | Commercial Office Buildings
RENTAL PROPERTIES
Closing costs	$ 142,000
Number of real estate properties sold | building	2
Properties sold	$ 2,600,000
(Loss) on Sale of Real Estate	$ 151,000
Properties at Brighton and Concord Avenue | Commercial
RENTAL PROPERTIES
Purchase price allocated to the value of the in-place leases		$ 4,714,000
Purchase price allocated to the value of the tenant relationships		305,000
Purchase price allocated to the value of below market leases		$ 1,165,000
Amortization period of value of the in-place leases		12 months
Amortization period of value of the tenant relationships		36 months