Note 13 - Segment Information - Reportable Segment Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022
Revenues	[1]	$ 10,915		$ 20,960
Operating costs and expenses		(6,547)		(6,171)
Depreciation expense		(869)		(1,109)
General and administrative expenses		(6,844)		(4,073)
Operating income (loss)		(3,345)		9,607
Pension and other post-retirement expenses		(436)		(7,885)
Interest expense		(6)		(6)
Other income		707		71
Income from continuing operations		(3,080)		1,787
Capital expenditures	[2]	819		33
Assets		42,223	[3]	42,406	[4]
Operating Segments [Member] | Real Estate Segment [Member]
Revenues	[1]	1,626		11,600
Operating costs and expenses		(595)		(1,026)
Depreciation expense		0
General and administrative expenses		(908)		(1,068)
Operating income (loss)		123		9,506
Capital expenditures	[2]	200		33
Assets	[3]	17,102	[4]	15,274
Operating Segments [Member] | Leasing Segment [Member]
Revenues	[1]	8,461		8,513
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	[2]	619		0
Assets	[3]	14,489		13,586
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	[3]	1,018		815
Operating Segments [Member] | Corporate and Other [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	[3]	$ 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] Segment assets are located in the United States

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