Note 10 - Segment Information - Reportable Segment Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Revenues	[1]	$ 12,443	$ 7,540	[2]
Operating costs and expenses		(5,600)	(4,726)	[2]
Depreciation expense		(1,188)	(1,289)	[2]
General and administrative expenses		(4,018)	(4,077)
Operating income (loss)		1,637	(2,552)	[2]
Pension and other post-retirement expenses		(4,732)	(475)
Interest expense		(122)	(134)
Other income		13	894
Loss from continuing operations		(3,204)	(2,267)
Capital expenditures	[3]	103	517
Assets	[4]	37,919	38,470	[2]
Operating Segments [Member] | Real Estate Segment [Member]
Revenues	[1]	3,400	772
Operating costs and expenses		(750)	(600)
General and administrative expenses		(1,049)	(1,075)
Operating income (loss)		1,601	(903)
Pension and other post-retirement expenses
Interest expense
Other income
Loss from continuing operations
Capital expenditures	[3]	74	436
Assets	[4]	15,525	14,851
Operating Segments [Member] | Leasing Segment [Member]
Revenues	[1]	8,103	5,948
Operating costs and expenses		(3,495)	(2,933)
Depreciation expense		(1,177)	(1,278)
General and administrative expenses		(1,121)	(1,131)
Operating income (loss)		2,310	606
Pension and other post-retirement expenses
Interest expense
Other income
Loss from continuing operations
Capital expenditures	[3]	29	81
Assets	[4]	14,684	16,109
Operating Segments [Member] | Resort Amenities Segment [Member]
Revenues	[1]	940	820
Operating costs and expenses		(1,355)	(1,193)
General and administrative expenses		(487)	(492)
Operating income (loss)		(902)	(865)
Pension and other post-retirement expenses
Interest expense
Other income
Loss from continuing operations
Capital expenditures	[3]	0	0
Assets	[4]	800	830
Operating Segments [Member] | Corporate and Other [Member]
Depreciation expense		(11)	(11)	[2]
General and administrative expenses		(1,361)	(1,379)
Operating income (loss)		(1,372)	(1,390)	[2]
Pension and other post-retirement expenses
Interest expense
Other income
Loss from continuing operations
Capital expenditures	[3]	0	0	[2]
Assets	[4]	$ 6,910	$ 6,680	[2]

[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 at December 31, 2020.

[3] Includes expenditures for property and deferred costs.

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