Consolidated Statements of Income and Comprehensive Income (Loss) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
OPERATING REVENUES
Revenue from contracts with customers	$ 4,814,000
Leasing	6,223,000	$ 5,732,000
Operating revenues	11,037,000	24,582,000
OPERATING COSTS AND EXPENSES
Leasing	2,570,000	2,476,000
General and administrative	2,896,000	2,515,000
Share-based compensation	1,540,000	1,319,000
Depreciation	1,770,000	1,756,000
Total Operating Costs and Expenses	14,868,000	12,621,000
OPERATING INCOME (LOSS)	(3,831,000)	11,961,000
Pension and other post-retirement expenses	(514,000)	(871,000)
Interest expense	(156,000)	(190,000)
Income tax benefit	4,999,000
NET INCOME	498,000	10,900,000
Pension, net of income taxes of $0	(1,550,000)	2,041,000
COMPREHENSIVE INCOME (LOSS)	$ (1,052,000)	$ 12,941,000
NET INCOME PER COMMON SHARE
--BASIC AND DILUTED (in dollars per share)	$ 0.03	$ 0.57
Real Estate Sales [Member]
OPERATING REVENUES
Revenue from contracts with customers		$ 13,681,000
Real Estate Commissions [Member]
OPERATING REVENUES
Revenue from contracts with customers	446,000	894,000
Public Utilities [Member]
OPERATING REVENUES
Revenue from contracts with customers	3,220,000	3,153,000
OPERATING COSTS AND EXPENSES
Operating costs	2,213,000	2,065,000
Resort Amenities and Other [Member]
OPERATING REVENUES
Revenue from contracts with customers	1,148,000	1,122,000
OPERATING COSTS AND EXPENSES
Operating costs	1,109,000	1,033,000
Real Estate [Member]
OPERATING REVENUES
Revenue from contracts with customers	446,000
OPERATING COSTS AND EXPENSES
Operating costs		579,000
Other	$ 2,770,000	$ 878,000