OTHER INVESTMENTS (Details 2) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 576,000	$ 532,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	188,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	576,000	720,000
Unrealized
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(131,000)	(109,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	0	(45,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	(131,000)	(154,000)
Partnerships Owning Investments In Real Estate And Related [Member]
Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		169,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total		169,000
Unrealized
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss		(52,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss		(52,000)
Partnerships Owning Investments in Diversified Businesses [Member]
Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	576,000	363,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	188,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	576,000	551,000
Unrealized
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(131,000)	(57,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	0	(45,000)
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss	$ (131,000)	$ (102,000)