Note 10 - Segment Information - Reportable Segment Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019		Dec. 31, 2018
Revenues		$ 10,045		$ 8,860
Depreciation expense		(1,412)		(1,490)
General and administrative and other expenses		(2,254)		(2,896)
Operating income (loss)		(796)		(3,982)
Pension and other post-retirement expenses		(1,016)		(514)
Income Tax Expense (Benefit), Total		4,999		(4,999)
Loss from continuing operations		7,009		(347)
Assets		39,119		48,192
Income tax (expense) benefit		(4,999)		4,999
Income from continuing operations		(7,009)		347
Operating Segments [Member] | Real Estate Segment [Member]
Revenues	[1]	915		446
Operating costs and expenses		(1,185)		(2,770)
Depreciation expense
General and administrative and other expenses		(1,069)		(1,145)
Operating income (loss)		(1,339)		(3,469)
Capital expenditures	[3]	278	[2]	395
Assets	[4]	13,789		13,634
Operating Segments [Member] | Leasing Segment [Member]
Revenues	[1]	8,148		7,266
Operating costs and expenses		(3,228)		(3,037)
Depreciation expense		(1,352)		(1,424)
General and administrative and other expenses		(1,102)		(1,222)
Operating income (loss)		2,466		1,583
Capital expenditures	[3]	86	[2]	156
Assets	[4]	17,995		18,778
Operating Segments [Member] | Utilities Segment [Member]
Revenues	[1]	982		1,148
Operating costs and expenses		(1,030)		(1,109)
Depreciation expense		(49)		(57)
General and administrative and other expenses		(479)		(531)
Operating income (loss)		(576)		(549)
Capital expenditures	[3]		[2]
Assets	[4]	1,039		1,099
Operating Segments [Member] | Resort Amenities Segment [Member]
Revenues	[1],[2]
Operating costs and expenses	[2]
Depreciation expense	[2]	(11)		(9)
General and administrative and other expenses	[2]	(1,336)		(1,538)
Operating income (loss)	[2]	(1,347)		(1,547)
Capital expenditures	[2],[3]	626		155
Assets	[2],[4]	6,296		14,681
Operating Segments [Member] | Corporate and Other [Member]
Revenues	[1]	10,045		8,860	[2]
Operating costs and expenses	[2]	(5,443)		(6,916)
Depreciation expense	[2]	(1,412)		(1,490)
General and administrative and other expenses	[2]	(3,986)		(4,436)
Operating income (loss)	[2]	(796)		(3,982)
Pension and other post-retirement expenses		(1,016)	[2]	(514)
Interest expense		(198)	[2]	(156)
Income Tax Expense (Benefit), Total		(4,999)		(4,999)
Loss from continuing operations		(7,009)		(347)
Capital expenditures	[3]	990	[2]	706
Assets	[2],[4]	39,119		48,192
Income tax (expense) benefit		4,999		4,999
Income from continuing operations		$ 7,009		$ 347

[1] Amounts are principally revenues from external customers and exclude equity in earnings of affiliates.

[2] Consists primarily of miscellaneous transactions, unallocated general and administrative, and pension and other post-retirement expenses. Includes assets related to discontinued operations of $4.5 million and $7.7 million at December 31, 2019 and 2018, respectively

[3] Primarily includes expenditures for property and deferred costs.

[4] Segment assets are located in the United States.