RENTAL INCOME (Concentration) (Details) - USD ($)	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022
Concentration Risk
Aggregate contingent rentals	$ 328,000	$ 437,000
Commercial rental income \| Major tenant \| Staples and Trader Joes \| WRF Associates LLC Strip Mall Framingham, Massachusetts
Concentration Risk
Concentration risk percentage	23.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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