Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
OPERATING REVENUES
Leasing	$ 1,719,000	$ 1,558,000	$ 3,396,000	$ 3,053,000
Operating revenues	3,105,000	2,960,000	5,948,000	5,502,000
OPERATING COSTS AND EXPENSES
Leasing	603,000	706,000	1,178,000	1,284,000
General and administrative	510,000	725,000	1,350,000	1,556,000
Share-based compensation	374,000	320,000	972,000	899,000
Depreciation	431,000	446,000	863,000	885,000
Total operating costs and expenses	2,967,000	3,391,000	6,604,000	6,758,000
OPERATING INCOME (LOSS)	138,000	(431,000)	(656,000)	(1,256,000)
Pension and other post-retirement expenses	(256,000)	(102,000)	(509,000)	(204,000)
Interest expense	(63,000)	(37,000)	(110,000)	(74,000)
NET LOSS	(181,000)	(570,000)	(1,275,000)	(1,534,000)
Pension, net of income taxes of $0	211,000	185,000	423,000	370,000
COMPREHENSIVE INCOME (LOSS)	$ 30,000	$ (385,000)	$ (852,000)	$ (1,164,000)
NET LOSS PER COMMON SHARE
--BASIC AND DILUTED (in dollars per share)	$ (0.01)	$ (0.03)	$ (0.07)	$ (0.08)
Real Estate [Member]
OPERATING REVENUES
Operating revenues	$ 209,000	$ 300,000	$ 366,000	$ 336,000
OPERATING COSTS AND EXPENSES
Operating costs	255,000	443,000	521,000	509,000
Public Utilities [Member]
OPERATING REVENUES
Operating revenues	929,000	810,000	1,677,000	1,514,000
OPERATING COSTS AND EXPENSES
Operating costs	586,000	520,000	1,187,000	1,041,000
Resort Amenities and Other [Member]
OPERATING REVENUES
Operating revenues	248,000	292,000	509,000	599,000
OPERATING COSTS AND EXPENSES
Operating costs	$ 208,000	$ 231,000	$ 533,000	$ 584,000