Note 13 - Segment Information - Reportable Segment Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022
Revenues		$ 9,289		$ 20,960	[1]
Operating costs and expenses				(6,171)
Depreciation expense		(869)		(1,109)
General and administrative expenses				(4,073)
Operating income (loss)		(4,971)		9,607
Pension and other post-retirement expenses		(436)		(7,885)
Interest expense				(6)
Gain from dercognition of nonfinancial asset		1,626		0
Other income		707		71
Income from continuing operations				1,787
Capital expenditures	[2]			33
Assets		42,223		42,406	[3]
Operating Segments [Member]
Revenues	[1]	9,289
Operating costs and expenses		(6,547)
Depreciation expense		(869)
General and administrative expenses		(6,844)
Operating income (loss)		(4,971)
Pension and other post-retirement expenses		(436)
Interest expense		(6)
Gain from dercognition of nonfinancial asset		1,626
Other income		707
Income from continuing operations		(3,080)
Capital expenditures	[2]	819
Assets	[4]	42,223
Operating Segments [Member] | Real Estate Segment [Member]
Revenues	[1]	0		11,600
Operating costs and expenses		(595)		(1,026)
Depreciation expense		0
General and administrative expenses		(908)		(1,068)
Operating income (loss)		(1,503)		9,506
Capital expenditures	[2]	200		33
Assets	[4]	17,102	[3]	15,274
Operating Segments [Member] | Leasing Segment [Member]
Revenues		8,461		8,513	[1]
Operating costs and expenses		(4,420)		(3,598)
Depreciation expense		(861)		(1,101)
General and administrative expenses		(456)		(1,141)
Operating income (loss)		2,724		2,673
Capital expenditures		619		0	[2]
Assets		14,489		13,586	[4]
Operating Segments [Member] | Resort Amenities Segment [Member]
Revenues	[1]	828		847
Operating costs and expenses		(1,532)		(1,547)
Depreciation expense		0
General and administrative expenses		(393)		(496)
Operating income (loss)		(1,097)		(1,196)
Capital expenditures	[2]	0		0
Assets	[4]	1,018		815
Operating Segments [Member] | Corporate Segment and Other Operating Segment [Member]
Revenues	[1]	0
Operating costs and expenses		0
Depreciation expense		(8)		(8)
General and administrative expenses		(5,087)		(1,368)
Operating income (loss)		(5,095)		(1,376)
Capital expenditures	[2]	0		0
Assets	[4]	$ 9,614		$ 12,731

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

[2] Includes expenditures for property and deferred costs.

[3] The Land Development and Sales segment includes a $1.6 million equity method investment

[4] Segment assets are located in the United States