Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OPERATING REVENUES
Leasing	$ 1,677,000	$ 1,495,000
Operating revenues	2,843,000	2,542,000
OPERATING COSTS AND EXPENSES
Leasing	568,000	578,000
General and administrative	864,000	831,000
Share-based compensation	598,000	579,000
Depreciation	432,000	439,000
Total operating costs and expenses	3,638,000	3,367,000
OPERATING LOSS	(795,000)	(825,000)
Pension and other post-retirement expenses	(253,000)	(102,000)
Interest expense	(47,000)	(37,000)
NET LOSS	(1,095,000)	(964,000)
Pension, net of income taxes of $0	211,000	185,000
COMPREHENSIVE LOSS	$ (884,000)	$ (779,000)
NET LOSS PER COMMON SHARE
--BASIC AND DILUTED (in dollars per share)	$ (0.06)	$ (0.05)
Real Estate [Member]
OPERATING REVENUES
Operating revenues	$ 157,000	$ 36,000
OPERATING COSTS AND EXPENSES
Operating costs	264,000	66,000
Public Utilities [Member]
OPERATING REVENUES
Operating revenues	748,000	704,000
OPERATING COSTS AND EXPENSES
Operating costs	601,000	521,000
Resort Amenities and Other [Member]
OPERATING REVENUES
Operating revenues	261,000	307,000
OPERATING COSTS AND EXPENSES
Operating costs	$ 311,000	$ 353,000