PREPAID EXPENSES and OTHER ASSETS (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
OTHER ASSETS
Security deposits	$ 2,790,000	$ 2,830,000
Escrow deposits to fund future capital improvements	1,225,000	1,073,000
Deposits and escrows held for acquisitions	546,426	534,941
Intangible assets, net of accumulated amortization	45,000	51,000
Accumulated amortization on intangible assets	1,373,000	1,367,000
Financing fees, net	$ 9,000	$ 42,000