Note 10 - Segment Information - Reportable Segment Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Revenues	[1]	$ 7,540		$ 10,045	[2]
Operating costs and expenses	[2]	(4,726)		(5,443)
Depreciation expense	[2]	(1,289)		(1,412)
General and administrative and other expenses	[2]	(4,077)		(3,986)
Operating income (loss)	[2]	(2,552)		(796)
Pension and other post-retirement expenses		(475)	[2]	(1,016)
Interest expense		(134)	[2]	(198)
Other Income		894
Loss from continuing operations		(2,267)		(7,009)
Capital expenditures	[3]	517	[2]	990
Assets	[2],[4]	38,470		39,119
Income tax expense				(4,999)		$ 5,000
Operating Segments [Member] | Real Estate Segment [Member]
Revenues	[1]	772		915
Operating costs and expenses		(600)		(1,185)
Depreciation expense
General and administrative and other expenses		(1,075)		(1,069)
Operating income (loss)		(903)		(1,339)
Capital expenditures	[3]	436	[2]	278
Assets	[4]	14,851		13,789
Operating Segments [Member] | Leasing Segment [Member]
Revenues	[1]	5,948		8,148
Operating costs and expenses		(2,933)		(3,228)
Depreciation expense		(1,278)		(1,352)
General and administrative and other expenses		(1,131)		(1,102)
Operating income (loss)		606		2,466
Capital expenditures	[3]	81	[2]	86
Assets	[4]	16,109		17,432
Operating Segments [Member] | Resort Amenities Segment [Member]
Revenues	[1]	820		982
Operating costs and expenses		(1,193)		(1,030)
Depreciation expense
General and administrative and other expenses		(492)		(479)
Operating income (loss)		(865)		(527)
Capital expenditures	[3]		[2]
Assets	[4]	830		1,039
Operating Segments [Member] | Corporate and Other [Member]
Revenues	[1],[2]
Operating costs and expenses	[2]
Depreciation expense	[2]	(11)		(60)
General and administrative and other expenses	[2]	(1,379)		(1,336)
Operating income (loss)	[2]	(1,390)		(1,396)
Capital expenditures	[2],[3]			626
Assets	[2],[4]	$ 6,680		$ 6,859

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

[2] Includes assets related to discontinued operations of $4.7 million and $5.2 million at December 31, 2020 and 2019, respectively.

[3] Includes expenditures for property and deferred costs.

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